2621979947 has 2 divisors, whose sum is σ = 2621979948. Its totient is φ = 2621979946.

The previous prime is 2621979859. The next prime is 2621979953. The reversal of 2621979947 is 7499791262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621979947 - 2²⁴ = 2605202731 is a prime.

It is a super-3 number, since 3×2621979947³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2621979892 and 2621979901.

It is not a weakly prime, because it can be changed into another prime (2621979977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310989973 + 1310989974.

It is an arithmetic number, because the mean of its divisors is an integer number (1310989974).

Almost surely, 2^2621979947 is an apocalyptic number.

2621979947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621979947 is an equidigital number, since it uses as much as digits as its factorization.

2621979947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 2621979947 is about 51205.2726484295. The cubic root of 2621979947 is about 1378.9328631348.

The spelling of 2621979947 in words is "two billion, six hundred twenty-one million, nine hundred seventy-nine thousand, nine hundred forty-seven".