4997998081 has 2 divisors, whose sum is σ = 4997998082. Its totient is φ = 4997998080.

The previous prime is 4997997967. The next prime is 4997998087. The reversal of 4997998081 is 1808997994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4869946225 + 128051856 = 69785^2 + 11316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4997998081 is a prime.

It is a super-2 number, since 2×4997998081² = 49959969635359365122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4997998087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2498999040 + 2498999041.

It is an arithmetic number, because the mean of its divisors is an integer number (2498999041).

Almost surely, 2^4997998081 is an apocalyptic number.

It is an amenable number.

4997998081 is a deficient number, since it is larger than the sum of its proper divisors (1).

4997998081 is an equidigital number, since it uses as much as digits as its factorization.

4997998081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 64.

The square root of 4997998081 is about 70696.5209964394. The cubic root of 4997998081 is about 1709.7477006562.

The spelling of 4997998081 in words is "four billion, nine hundred ninety-seven million, nine hundred ninety-eight thousand, eighty-one".