625905397 has 16 divisors (see below), whose sum is σ = 679831488. Its totient is φ = 572832000.

The previous prime is 625905367. The next prime is 625905409. The reversal of 625905397 is 793509526.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-625905397 is a prime.

It is a super-3 number, since 3×625905397³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625905367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412658 + ... + 1413100.

It is an arithmetic number, because the mean of its divisors is an integer number (42489468).

Almost surely, 2^625905397 is an apocalyptic number.

It is an amenable number.

625905397 is a deficient number, since it is larger than the sum of its proper divisors (53926091).

625905397 is a wasteful number, since it uses less digits than its factorization.

625905397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 510300, while the sum is 46.

The square root of 625905397 is about 25018.1013867959. The cubic root of 625905397 is about 855.4006293644.

The spelling of 625905397 in words is "six hundred twenty-five million, nine hundred five thousand, three hundred ninety-seven".