2611531973 has 2 divisors, whose sum is σ = 2611531974. Its totient is φ = 2611531972.

The previous prime is 2611531919. The next prime is 2611532051. The reversal of 2611531973 is 3791351162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1453286884 + 1158245089 = 38122^2 + 34033^2 .

It is a cyclic number.

It is not a de Polignac number, because 2611531973 - 2²² = 2607337669 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2611531073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305765986 + 1305765987.

It is an arithmetic number, because the mean of its divisors is an integer number (1305765987).

Almost surely, 2^2611531973 is an apocalyptic number.

It is an amenable number.

2611531973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2611531973 is an equidigital number, since it uses as much as digits as its factorization.

2611531973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 2611531973 is about 51103.1503236346. The cubic root of 2611531973 is about 1377.0988504533.

The spelling of 2611531973 in words is "two billion, six hundred eleven million, five hundred thirty-one thousand, nine hundred seventy-three".