1623855497 has 4 divisors (see below), whose sum is σ = 1771478736. Its totient is φ = 1476232260.

The previous prime is 1623855427. The next prime is 1623855511. The reversal of 1623855497 is 7945583261.

It is a happy number.

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 1623855497 - 2⁸ = 1623855241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1623855427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73811603 + ... + 73811624.

It is an arithmetic number, because the mean of its divisors is an integer number (442869684).

Almost surely, 2^1623855497 is an apocalyptic number.

It is an amenable number.

1623855497 is a deficient number, since it is larger than the sum of its proper divisors (147623239).

1623855497 is a wasteful number, since it uses less digits than its factorization.

1623855497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147623238.

The product of its digits is 1814400, while the sum is 50.

The square root of 1623855497 is about 40297.0904284664. The cubic root of 1623855497 is about 1175.3912677944.

The spelling of 1623855497 in words is "one billion, six hundred twenty-three million, eight hundred fifty-five thousand, four hundred ninety-seven".