78330957 has 4 divisors (see below), whose sum is σ = 104441280. Its totient is φ = 52220636.

The previous prime is 78330953. The next prime is 78330991. The reversal of 78330957 is 75903387.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78330957 - 2² = 78330953 is a prime.

It is a super-2 number, since 2×78330957² = 12271477649071698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78330953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13055157 + ... + 13055162.

It is an arithmetic number, because the mean of its divisors is an integer number (26110320).

Almost surely, 2^78330957 is an apocalyptic number.

It is an amenable number.

78330957 is a deficient number, since it is larger than the sum of its proper divisors (26110323).

78330957 is a wasteful number, since it uses less digits than its factorization.

78330957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26110322.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 78330957 is about 8850.4777837131. The cubic root of 78330957 is about 427.8693173242.

The spelling of 78330957 in words is "seventy-eight million, three hundred thirty thousand, nine hundred fifty-seven".