1623494057 has 4 divisors (see below), whose sum is σ = 1623624660. Its totient is φ = 1623363456.

The previous prime is 1623494053. The next prime is 1623494113. The reversal of 1623494057 is 7504943261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7504943261 = 151 ⋅49701611.

It can be written as a sum of positive squares in 2 ways, for example, as 1358585881 + 264908176 = 36859^2 + 16276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623494057 - 2² = 1623494053 is a prime.

It is a super-2 number, since 2×1623494057² = 5271465906228638498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1623494051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44432 + ... + 72257.

It is an arithmetic number, because the mean of its divisors is an integer number (405906165).

Almost surely, 2^1623494057 is an apocalyptic number.

It is an amenable number.

1623494057 is a deficient number, since it is larger than the sum of its proper divisors (130603).

1623494057 is a wasteful number, since it uses less digits than its factorization.

1623494057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130602.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 1623494057 is about 40292.6054878560. The cubic root of 1623494057 is about 1175.3040545860.

The spelling of 1623494057 in words is "one billion, six hundred twenty-three million, four hundred ninety-four thousand, fifty-seven".