2629317961 has 4 divisors (see below), whose sum is σ = 2629441300. Its totient is φ = 2629194624.

The previous prime is 2629317941. The next prime is 2629317991. The reversal of 2629317961 is 1697139262.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 918999225 + 1710318736 = 30315^2 + 41356^2 .

It is a cyclic number.

It is not a de Polignac number, because 2629317961 - 2¹³ = 2629309769 is a prime.

It is a deceptive number, since it divides R_2629317960.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2629317941) 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, 20556 + ... + 75373.

It is an arithmetic number, because the mean of its divisors is an integer number (657360325).

Almost surely, 2^2629317961 is an apocalyptic number.

2629317961 is the 27409-th nonagonal number.

It is an amenable number.

2629317961 is a deficient number, since it is larger than the sum of its proper divisors (123339).

2629317961 is an equidigital number, since it uses as much as digits as its factorization.

2629317961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123338.

The product of its digits is 244944, while the sum is 46.

The square root of 2629317961 is about 51276.8754995856. The cubic root of 2629317961 is about 1380.2180501557.

The spelling of 2629317961 in words is "two billion, six hundred twenty-nine million, three hundred seventeen thousand, nine hundred sixty-one".