1612263409 has 3 divisors (see below), whose sum is σ = 1612303563. Its totient is φ = 1612223256.

The previous prime is 1612263397. The next prime is 1612263421. The reversal of 1612263409 is 9043622161.

It is a happy number.

The square root of 1612263409 is 40153.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1612263397) and next prime (1612263421).

It can be written as a sum of positive squares in only one way, i.e., 887146225 + 725117184 = 29785^2 + 26928^2 .

It is not a de Polignac number, because 1612263409 - 2²⁹ = 1075392497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612263509) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20077 + ... + 60229.

It is an arithmetic number, because the mean of its divisors is an integer number (537434521).

Almost surely, 2^1612263409 is an apocalyptic number.

1612263409 is the 40153-rd square number.

1612263409 is the 20077-th centered octagonal number.

It is an amenable number.

1612263409 is a deficient number, since it is larger than the sum of its proper divisors (40154).

1612263409 is an frugal number, since it uses more digits than its factorization.

1612263409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80306 (or 40153 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The cubic root of 1612263409 is about 1172.5876952607.

The spelling of 1612263409 in words is "one billion, six hundred twelve million, two hundred sixty-three thousand, four hundred nine".