79400473 has 2 divisors, whose sum is σ = 79400474. Its totient is φ = 79400472.

The previous prime is 79400471. The next prime is 79400501. The reversal of 79400473 is 37400497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64593369 + 14807104 = 8037^2 + 3848^2 .

It is a cyclic number.

It is not a de Polignac number, because 79400473 - 2¹ = 79400471 is a prime.

It is a super-2 number, since 2×79400473² = 12608870225247458, which contains 22 as substring.

Together with 79400471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (79400471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39700236 + 39700237.

It is an arithmetic number, because the mean of its divisors is an integer number (39700237).

Almost surely, 2^79400473 is an apocalyptic number.

It is an amenable number.

79400473 is a deficient number, since it is larger than the sum of its proper divisors (1).

79400473 is an equidigital number, since it uses as much as digits as its factorization.

79400473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 79400473 is about 8910.6943051594. The cubic root of 79400473 is about 429.8078698180.

The spelling of 79400473 in words is "seventy-nine million, four hundred thousand, four hundred seventy-three".