79987437 has 6 divisors (see below), whose sum is σ = 115537422. Its totient is φ = 53324952.

The previous prime is 79987367. The next prime is 79987459. The reversal of 79987437 is 73478997.

It can be written as a sum of positive squares in only one way, i.e., 79762761 + 224676 = 8931^2 + 474^2 .

It is not a de Polignac number, because 79987437 - 2¹⁶ = 79921901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79987477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4443738 + ... + 4443755.

It is an arithmetic number, because the mean of its divisors is an integer number (19256237).

Almost surely, 2^79987437 is an apocalyptic number.

It is an amenable number.

79987437 is a deficient number, since it is larger than the sum of its proper divisors (35549985).

79987437 is a wasteful number, since it uses less digits than its factorization.

79987437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8887499 (or 8887496 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 79987437 is about 8943.5695893754. The cubic root of 79987437 is about 430.8643816898.

The spelling of 79987437 in words is "seventy-nine million, nine hundred eighty-seven thousand, four hundred thirty-seven".