78996437 has 4 divisors (see below), whose sum is σ = 85073100. Its totient is φ = 72919776.

The previous prime is 78996427. The next prime is 78996469. The reversal of 78996437 is 73469987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73469987 = 577 ⋅127331.

It can be written as a sum of positive squares in 2 ways, for example, as 32878756 + 46117681 = 5734^2 + 6791^2 .

It is a cyclic number.

It is not a de Polignac number, because 78996437 - 2¹² = 78992341 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 (78996427) 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, 3038312 + ... + 3038337.

It is an arithmetic number, because the mean of its divisors is an integer number (21268275).

Almost surely, 2^78996437 is an apocalyptic number.

It is an amenable number.

78996437 is a deficient number, since it is larger than the sum of its proper divisors (6076663).

78996437 is a wasteful number, since it uses less digits than its factorization.

78996437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6076662.

The product of its digits is 2286144, while the sum is 53.

The square root of 78996437 is about 8887.9939806460. The cubic root of 78996437 is about 429.0775918611.

The spelling of 78996437 in words is "seventy-eight million, nine hundred ninety-six thousand, four hundred thirty-seven".