85972993 has 4 divisors (see below), whose sum is σ = 87256240. Its totient is φ = 84689748.

The previous prime is 85972981. The next prime is 85973003. The reversal of 85972993 is 39927958.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85972993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85972993.

It is not an unprimeable number, because it can be changed into a prime (85972933) 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, 641523 + ... + 641656.

It is an arithmetic number, because the mean of its divisors is an integer number (21814060).

Almost surely, 2^85972993 is an apocalyptic number.

It is an amenable number.

85972993 is a deficient number, since it is larger than the sum of its proper divisors (1283247).

85972993 is a wasteful number, since it uses less digits than its factorization.

85972993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283246.

The product of its digits is 1224720, while the sum is 52.

The square root of 85972993 is about 9272.1622613067. The cubic root of 85972993 is about 441.3542863555.

The spelling of 85972993 in words is "eighty-five million, nine hundred seventy-two thousand, nine hundred ninety-three".