790436639 has 4 divisors (see below), whose sum is σ = 799960056. Its totient is φ = 780913224.

The previous prime is 790436623. The next prime is 790436659. The reversal of 790436639 is 936634097.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936634097 = 7 ⋅133804871.

It is a cyclic number.

It is not a de Polignac number, because 790436639 - 2⁴ = 790436623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 790436593 and 790436602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (790436659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4761584 + ... + 4761749.

It is an arithmetic number, because the mean of its divisors is an integer number (199990014).

Almost surely, 2^790436639 is an apocalyptic number.

790436639 is a deficient number, since it is larger than the sum of its proper divisors (9523417).

790436639 is an equidigital number, since it uses as much as digits as its factorization.

790436639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9523416.

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 790436639 is about 28114.7050313533. The cubic root of 790436639 is about 924.6038289834.

The spelling of 790436639 in words is "seven hundred ninety million, four hundred thirty-six thousand, six hundred thirty-nine".