2087556997 has 2 divisors, whose sum is σ = 2087556998. Its totient is φ = 2087556996.

The previous prime is 2087556959. The next prime is 2087557001. The reversal of 2087556997 is 7996557802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2067611841 + 19945156 = 45471^2 + 4466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2087556997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2087556917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043778498 + 1043778499.

It is an arithmetic number, because the mean of its divisors is an integer number (1043778499).

Almost surely, 2^2087556997 is an apocalyptic number.

It is an amenable number.

2087556997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087556997 is an equidigital number, since it uses as much as digits as its factorization.

2087556997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The square root of 2087556997 is about 45689.7909494014. The cubic root of 2087556997 is about 1278.0449069213.

The spelling of 2087556997 in words is "two billion, eighty-seven million, five hundred fifty-six thousand, nine hundred ninety-seven".