647123525 has 24 divisors (see below), whose sum is σ = 826447104. Its totient is φ = 502286400.

The previous prime is 647123501. The next prime is 647123531. The reversal of 647123525 is 525321746.

It is not a de Polignac number, because 647123525 - 2⁶ = 647123461 is a prime.

It is a Duffinian number.

Its product of digits (50400) is a multiple of the sum of its prime divisors (2016).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 427520 + ... + 429030.

It is an arithmetic number, because the mean of its divisors is an integer number (34435296).

Almost surely, 2^647123525 is an apocalyptic number.

It is an amenable number.

647123525 is a deficient number, since it is larger than the sum of its proper divisors (179323579).

647123525 is a wasteful number, since it uses less digits than its factorization.

647123525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021 (or 2016 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 647123525 is about 25438.6227024971. The cubic root of 647123525 is about 864.9594131557.

The spelling of 647123525 in words is "six hundred forty-seven million, one hundred twenty-three thousand, five hundred twenty-five".