78497377 has 16 divisors (see below), whose sum is σ = 91393920. Its totient is φ = 66033792.

The previous prime is 78497369. The next prime is 78497383. The reversal of 78497377 is 77379487.

It is a cyclic number.

It is not a de Polignac number, because 78497377 - 2³ = 78497369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78497357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101163 + ... + 101935.

It is an arithmetic number, because the mean of its divisors is an integer number (5712120).

Almost surely, 2^78497377 is an apocalyptic number.

It is an amenable number.

78497377 is a deficient number, since it is larger than the sum of its proper divisors (12896543).

78497377 is a wasteful number, since it uses less digits than its factorization.

78497377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032.

The product of its digits is 2074464, while the sum is 52.

The square root of 78497377 is about 8859.8745476446. The cubic root of 78497377 is about 428.1721164832.

The spelling of 78497377 in words is "seventy-eight million, four hundred ninety-seven thousand, three hundred seventy-seven".