79620405 has 16 divisors (see below), whose sum is σ = 127505664. Its totient is φ = 42426560.

The previous prime is 79620403. The next prime is 79620407. The reversal of 79620405 is 50402697.

It is an interprime number because it is at equal distance from previous prime (79620403) and next prime (79620407).

It is not a de Polignac number, because 79620405 - 2¹ = 79620403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79620403) 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, 26647 + ... + 29483.

It is an arithmetic number, because the mean of its divisors is an integer number (7969104).

Almost surely, 2^79620405 is an apocalyptic number.

It is an amenable number.

79620405 is a deficient number, since it is larger than the sum of its proper divisors (47885259).

79620405 is a wasteful number, since it uses less digits than its factorization.

79620405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 79620405 is about 8923.0266726039. The cubic root of 79620405 is about 430.2043467175.

It can be divided in two parts, 7962040 and 5, that added together give a triangular number (7962045 = T₃₉₉₀).

The spelling of 79620405 in words is "seventy-nine million, six hundred twenty thousand, four hundred five".