2620839869 has 2 divisors, whose sum is σ = 2620839870. Its totient is φ = 2620839868.

The previous prime is 2620839863. The next prime is 2620839887. The reversal of 2620839869 is 9689380262.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2608144900 + 12694969 = 51070^2 + 3563^2 .

It is a cyclic number.

It is not a de Polignac number, because 2620839869 - 2⁴ = 2620839853 is a prime.

It is a super-2 number, since 2×2620839869² = 13737603237879874322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2620839869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2620839863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310419934 + 1310419935.

It is an arithmetic number, because the mean of its divisors is an integer number (1310419935).

Almost surely, 2^2620839869 is an apocalyptic number.

It is an amenable number.

2620839869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2620839869 is an equidigital number, since it uses as much as digits as its factorization.

2620839869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 2620839869 is about 51194.1390102422. The cubic root of 2620839869 is about 1378.7329736156.

The spelling of 2620839869 in words is "two billion, six hundred twenty million, eight hundred thirty-nine thousand, eight hundred sixty-nine".