79433987 has 4 divisors (see below), whose sum is σ = 82173120. Its totient is φ = 76694856.

The previous prime is 79433983. The next prime is 79433999. The reversal of 79433987 is 78933497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78933497 = 457 ⋅172721.

It is a cyclic number.

It is not a de Polignac number, because 79433987 - 2² = 79433983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79433983) 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, 1369523 + ... + 1369580.

It is an arithmetic number, because the mean of its divisors is an integer number (20543280).

Almost surely, 2^79433987 is an apocalyptic number.

79433987 is a deficient number, since it is larger than the sum of its proper divisors (2739133).

79433987 is a wasteful number, since it uses less digits than its factorization.

79433987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739132.

The product of its digits is 1143072, while the sum is 50.

The square root of 79433987 is about 8912.5746560688. The cubic root of 79433987 is about 429.8683335835.

The spelling of 79433987 in words is "seventy-nine million, four hundred thirty-three thousand, nine hundred eighty-seven".