1630454249 has 4 divisors (see below), whose sum is σ = 1631718480. Its totient is φ = 1629190020.

The previous prime is 1630454237. The next prime is 1630454251. The reversal of 1630454249 is 9424540361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1630454249 - 2¹² = 1630450153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630457249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630179 + ... + 632760.

It is an arithmetic number, because the mean of its divisors is an integer number (407929620).

Almost surely, 2^1630454249 is an apocalyptic number.

It is an amenable number.

1630454249 is a deficient number, since it is larger than the sum of its proper divisors (1264231).

1630454249 is a wasteful number, since it uses less digits than its factorization.

1630454249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264230.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 1630454249 is about 40378.8837017568. The cubic root of 1630454249 is about 1176.9812354458.

The spelling of 1630454249 in words is "one billion, six hundred thirty million, four hundred fifty-four thousand, two hundred forty-nine".