78425957 has 8 divisors (see below), whose sum is σ = 79062432. Its totient is φ = 77792400.

The previous prime is 78425933. The next prime is 78425987. The reversal of 78425957 is 75952487.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78425957 - 2¹⁰ = 78424933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78425987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103223 + ... + 103979.

It is an arithmetic number, because the mean of its divisors is an integer number (9882804).

Almost surely, 2^78425957 is an apocalyptic number.

It is an amenable number.

78425957 is a deficient number, since it is larger than the sum of its proper divisors (636475).

78425957 is a wasteful number, since it uses less digits than its factorization.

78425957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its digits is 705600, while the sum is 47.

The square root of 78425957 is about 8855.8430993328. The cubic root of 78425957 is about 428.0422211384.

The spelling of 78425957 in words is "seventy-eight million, four hundred twenty-five thousand, nine hundred fifty-seven".