87990404353 has 2 divisors, whose sum is σ = 87990404354. Its totient is φ = 87990404352.

The previous prime is 87990404323. The next prime is 87990404417. The reversal of 87990404353 is 35340409978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76602739984 + 11387664369 = 276772^2 + 106713^2 .

It is a cyclic number.

It is not a de Polignac number, because 87990404353 - 2¹⁷ = 87990273281 is a prime.

It is a super-2 number, since 2×87990404353² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87990404353.

It is not a weakly prime, because it can be changed into another prime (87990404303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43995202176 + 43995202177.

It is an arithmetic number, because the mean of its divisors is an integer number (43995202177).

Almost surely, 2^87990404353 is an apocalyptic number.

It is an amenable number.

87990404353 is a deficient number, since it is larger than the sum of its proper divisors (1).

87990404353 is an equidigital number, since it uses as much as digits as its factorization.

87990404353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 87990404353 in words is "eighty-seven billion, nine hundred ninety million, four hundred four thousand, three hundred fifty-three".