2890137721 has 2 divisors, whose sum is σ = 2890137722. Its totient is φ = 2890137720.

The previous prime is 2890137521. The next prime is 2890137737. The reversal of 2890137721 is 1277310982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2890137600 + 121 = 53760^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 2890137721 - 2²³ = 2881749113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2890137791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445068860 + 1445068861.

It is an arithmetic number, because the mean of its divisors is an integer number (1445068861).

Almost surely, 2^2890137721 is an apocalyptic number.

It is an amenable number.

2890137721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2890137721 is an equidigital number, since it uses as much as digits as its factorization.

2890137721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 2890137721 is about 53760.0011253720. The cubic root of 2890137721 is about 1424.4247553611.

The spelling of 2890137721 in words is "two billion, eight hundred ninety million, one hundred thirty-seven thousand, seven hundred twenty-one".