79801953 has 16 divisors (see below), whose sum is σ = 132658176. Its totient is φ = 41455440.

The previous prime is 79801951. The next prime is 79801963. The reversal of 79801953 is 35910897.

It is a happy number.

It is not a de Polignac number, because 79801953 - 2¹ = 79801951 is a prime.

It is a super-2 number, since 2×79801953² = 12736703405228418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79801951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172501 + ... + 172962.

It is an arithmetic number, because the mean of its divisors is an integer number (8291136).

Almost surely, 2^79801953 is an apocalyptic number.

It is an amenable number.

79801953 is a deficient number, since it is larger than the sum of its proper divisors (52856223).

79801953 is a wasteful number, since it uses less digits than its factorization.

79801953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345484.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 79801953 is about 8933.1938857275. The cubic root of 79801953 is about 430.5310780846.

The spelling of 79801953 in words is "seventy-nine million, eight hundred one thousand, nine hundred fifty-three".