78157373 has 4 divisors (see below), whose sum is σ = 89322720. Its totient is φ = 66992028.

The previous prime is 78157369. The next prime is 78157403. The reversal of 78157373 is 37375187.

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 78157373 - 2² = 78157369 is a prime.

It is a super-2 number, since 2×78157373² = 12217149908522258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78157373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78157333) 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 3 ways as a sum of consecutive naturals, for example, 5582663 + ... + 5582676.

It is an arithmetic number, because the mean of its divisors is an integer number (22330680).

Almost surely, 2^78157373 is an apocalyptic number.

It is an amenable number.

78157373 is a deficient number, since it is larger than the sum of its proper divisors (11165347).

78157373 is a wasteful number, since it uses less digits than its factorization.

78157373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11165346.

The product of its digits is 123480, while the sum is 41.

The square root of 78157373 is about 8840.6658685870. The cubic root of 78157373 is about 427.5530260365.

The spelling of 78157373 in words is "seventy-eight million, one hundred fifty-seven thousand, three hundred seventy-three".