164863925 has 6 divisors (see below), whose sum is σ = 204431298. Its totient is φ = 131891120.

The previous prime is 164863901. The next prime is 164863939. The reversal of 164863925 is 529368461.

It can be written as a sum of positive squares in 3 ways, for example, as 53202436 + 111661489 = 7294^2 + 10567^2 .

It is not a de Polignac number, because 164863925 - 2⁶ = 164863861 is a prime.

It is a super-2 number, since 2×164863925² = 54360227532811250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3297254 + ... + 3297303.

It is an arithmetic number, because the mean of its divisors is an integer number (34071883).

Almost surely, 2^164863925 is an apocalyptic number.

It is an amenable number.

164863925 is a deficient number, since it is larger than the sum of its proper divisors (39567373).

164863925 is an equidigital number, since it uses as much as digits as its factorization.

164863925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6594567 (or 6594562 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 164863925 is about 12839.9347739776. The cubic root of 164863925 is about 548.3298369978.

The spelling of 164863925 in words is "one hundred sixty-four million, eight hundred sixty-three thousand, nine hundred twenty-five".