2901813721 has 2 divisors, whose sum is σ = 2901813722. Its totient is φ = 2901813720.

The previous prime is 2901813661. The next prime is 2901813727. The reversal of 2901813721 is 1273181092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2815788096 + 86025625 = 53064^2 + 9275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2901813721 - 2¹¹ = 2901811673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2901813727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1450906860 + 1450906861.

It is an arithmetic number, because the mean of its divisors is an integer number (1450906861).

Almost surely, 2^2901813721 is an apocalyptic number.

It is an amenable number.

2901813721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2901813721 is an equidigital number, since it uses as much as digits as its factorization.

2901813721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 2901813721 is about 53868.4854158719. The cubic root of 2901813721 is about 1426.3403776464.

The spelling of 2901813721 in words is "two billion, nine hundred one million, eight hundred thirteen thousand, seven hundred twenty-one".