2620390679 has 2 divisors, whose sum is σ = 2620390680. Its totient is φ = 2620390678.

The previous prime is 2620390657. The next prime is 2620390687. The reversal of 2620390679 is 9760930262.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2620390679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2620390079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310195339 + 1310195340.

It is an arithmetic number, because the mean of its divisors is an integer number (1310195340).

Almost surely, 2^2620390679 is an apocalyptic number.

2620390679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2620390679 is an equidigital number, since it uses as much as digits as its factorization.

2620390679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 2620390679 is about 51189.7516989485. The cubic root of 2620390679 is about 1378.6542013543.

The spelling of 2620390679 in words is "two billion, six hundred twenty million, three hundred ninety thousand, six hundred seventy-nine".