79840531 has 8 divisors (see below), whose sum is σ = 82571264. Its totient is φ = 77119560.

The previous prime is 79840507. The next prime is 79840543. The reversal of 79840531 is 13504897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79840531 - 2¹¹ = 79838483 is a prime.

It is a super-2 number, since 2×79840531² = 12749020780723922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79840331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16696 + ... + 20938.

It is an arithmetic number, because the mean of its divisors is an integer number (10321408).

Almost surely, 2^79840531 is an apocalyptic number.

79840531 is a deficient number, since it is larger than the sum of its proper divisors (2730733).

79840531 is a wasteful number, since it uses less digits than its factorization.

79840531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4881.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 79840531 is about 8935.3528749569. The cubic root of 79840531 is about 430.6004429378.

The spelling of 79840531 in words is "seventy-nine million, eight hundred forty thousand, five hundred thirty-one".