2913991997 has 4 divisors (see below), whose sum is σ = 3330276576. Its totient is φ = 2497707420.

The previous prime is 2913991991. The next prime is 2913991999. The reversal of 2913991997 is 7991993192.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2913991997 - 2⁶ = 2913991933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2913991991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208142279 + ... + 208142292.

It is an arithmetic number, because the mean of its divisors is an integer number (832569144).

Almost surely, 2^2913991997 is an apocalyptic number.

It is an amenable number.

2913991997 is a deficient number, since it is larger than the sum of its proper divisors (416284579).

2913991997 is an equidigital number, since it uses as much as digits as its factorization.

2913991997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416284578.

The product of its digits is 2480058, while the sum is 59.

The square root of 2913991997 is about 53981.4041777351. The cubic root of 2913991997 is about 1428.3329387457.

The spelling of 2913991997 in words is "two billion, nine hundred thirteen million, nine hundred ninety-one thousand, nine hundred ninety-seven".