647123492 has 12 divisors (see below), whose sum is σ = 1181703936. Its totient is φ = 309493800.

The previous prime is 647123461. The next prime is 647123501. The reversal of 647123492 is 294321746.

It is an unprimeable number.

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, 3516884 + ... + 3517067.

It is an arithmetic number, because the mean of its divisors is an integer number (98475328).

Almost surely, 2^647123492 is an apocalyptic number.

It is an amenable number.

647123492 is a deficient number, since it is larger than the sum of its proper divisors (534580444).

647123492 is a wasteful number, since it uses less digits than its factorization.

647123492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033978 (or 7033976 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 647123492 is about 25438.6220538771. The cubic root of 647123492 is about 864.9593984529.

The spelling of 647123492 in words is "six hundred forty-seven million, one hundred twenty-three thousand, four hundred ninety-two".