2887912921 has 2 divisors, whose sum is σ = 2887912922. Its totient is φ = 2887912920.

The previous prime is 2887912903. The next prime is 2887912939. The reversal of 2887912921 is 1292197882.

It is a balanced prime because it is at equal distance from previous prime (2887912903) and next prime (2887912939).

It can be written as a sum of positive squares in only one way, i.e., 2879502921 + 8410000 = 53661^2 + 2900^2 .

It is a cyclic number.

It is not a de Polignac number, because 2887912921 - 2⁹ = 2887912409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2887912721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1443956460 + 1443956461.

It is an arithmetic number, because the mean of its divisors is an integer number (1443956461).

Almost surely, 2^2887912921 is an apocalyptic number.

It is an amenable number.

2887912921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2887912921 is an equidigital number, since it uses as much as digits as its factorization.

2887912921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 49.

The square root of 2887912921 is about 53739.3051778677. The cubic root of 2887912921 is about 1424.0591587448.

The spelling of 2887912921 in words is "two billion, eight hundred eighty-seven million, nine hundred twelve thousand, nine hundred twenty-one".