78293725 has 12 divisors (see below), whose sum is σ = 101306016. Its totient is φ = 59911280.

The previous prime is 78293717. The next prime is 78293729. The reversal of 78293725 is 52739287.

It is not a de Polignac number, because 78293725 - 2³ = 78293717 is a prime.

It is a super-2 number, since 2×78293725² = 12259814748751250, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78293729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67507 + ... + 68656.

It is an arithmetic number, because the mean of its divisors is an integer number (8442168).

Almost surely, 2^78293725 is an apocalyptic number.

It is an amenable number.

78293725 is a deficient number, since it is larger than the sum of its proper divisors (23012291).

78293725 is a wasteful number, since it uses less digits than its factorization.

78293725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136196 (or 136191 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 78293725 is about 8848.3741444403. The cubic root of 78293725 is about 427.8015154584.

The spelling of 78293725 in words is "seventy-eight million, two hundred ninety-three thousand, seven hundred twenty-five".