79402401 has 12 divisors (see below), whose sum is σ = 123515028. Its totient is φ = 48862944.

The previous prime is 79402373. The next prime is 79402409. The reversal of 79402401 is 10420497.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3294225 + 76108176 = 1815^2 + 8724^2 .

It is not a de Polignac number, because 79402401 - 2¹⁷ = 79271329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79402409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339210 + ... + 339443.

It is an arithmetic number, because the mean of its divisors is an integer number (10292919).

Almost surely, 2^79402401 is an apocalyptic number.

It is an amenable number.

79402401 is a deficient number, since it is larger than the sum of its proper divisors (44112627).

79402401 is a wasteful number, since it uses less digits than its factorization.

79402401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678672 (or 678669 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 79402401 is about 8910.8024891140. The cubic root of 79402401 is about 429.8113486506.

Adding to 79402401 its reverse (10420497), we get a palindrome (89822898).

The spelling of 79402401 in words is "seventy-nine million, four hundred two thousand, four hundred one".