79943775 has 24 divisors (see below), whose sum is σ = 139950864. Its totient is φ = 40128000.

The previous prime is 79943767. The next prime is 79943783. The reversal of 79943775 is 57734997.

It is an interprime number because it is at equal distance from previous prime (79943767) and next prime (79943783).

It is not a de Polignac number, because 79943775 - 2³ = 79943767 is a prime.

It is a super-2 number, since 2×79943775² = 12782014322501250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30076 + ... + 32625.

It is an arithmetic number, because the mean of its divisors is an integer number (5831286).

Almost surely, 2^79943775 is an apocalyptic number.

79943775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79943775 is a deficient number, since it is larger than the sum of its proper divisors (60007089).

79943775 is a wasteful number, since it uses less digits than its factorization.

79943775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62731 (or 62726 counting only the distinct ones).

The product of its digits is 1666980, while the sum is 51.

The square root of 79943775 is about 8941.1282845064. The cubic root of 79943775 is about 430.7859701068.

The spelling of 79943775 in words is "seventy-nine million, nine hundred forty-three thousand, seven hundred seventy-five".