78314157 has 12 divisors (see below), whose sum is σ = 113224540. Its totient is φ = 52161408.

The previous prime is 78314147. The next prime is 78314221. The reversal of 78314157 is 75141387.

It can be written as a sum of positive squares in 2 ways, for example, as 69705801 + 8608356 = 8349^2 + 2934^2 .

It is not a de Polignac number, because 78314157 - 2⁸ = 78313901 is a prime.

It is a super-2 number, since 2×78314157² = 12266214373241298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78314147) 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, 8319 + ... + 15027.

Almost surely, 2^78314157 is an apocalyptic number.

It is an amenable number.

78314157 is a deficient number, since it is larger than the sum of its proper divisors (34910383).

78314157 is a wasteful number, since it uses less digits than its factorization.

78314157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8012 (or 8009 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 78314157 is about 8849.5286315148. The cubic root of 78314157 is about 427.8387261047.

The spelling of 78314157 in words is "seventy-eight million, three hundred fourteen thousand, one hundred fifty-seven".