243904925 has 24 divisors (see below), whose sum is σ = 338868192. Its totient is φ = 172584000.

The previous prime is 243904907. The next prime is 243904943. The reversal of 243904925 is 529409342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243904907) and next prime (243904943).

It is not a de Polignac number, because 243904925 - 2¹⁸ = 243642781 is a prime.

It is a super-2 number, since 2×243904925² = 118979224878511250, 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 23 ways as a sum of consecutive naturals, for example, 1811 + ... + 22160.

It is an arithmetic number, because the mean of its divisors is an integer number (14119508).

Almost surely, 2^243904925 is an apocalyptic number.

243904925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243904925 is a deficient number, since it is larger than the sum of its proper divisors (94963267).

243904925 is a wasteful number, since it uses less digits than its factorization.

243904925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24029 (or 24024 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 243904925 is about 15617.4557787112. The cubic root of 243904925 is about 624.7988045729.

The spelling of 243904925 in words is "two hundred forty-three million, nine hundred four thousand, nine hundred twenty-five".