87901637 has 2 divisors, whose sum is σ = 87901638. Its totient is φ = 87901636.

The previous prime is 87901601. The next prime is 87901643. The reversal of 87901637 is 73610978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45508516 + 42393121 = 6746^2 + 6511^2 .

It is a cyclic number.

It is not a de Polignac number, because 87901637 - 2¹⁶ = 87836101 is a prime.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 87901594 and 87901603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87901687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43950818 + 43950819.

It is an arithmetic number, because the mean of its divisors is an integer number (43950819).

Almost surely, 2^87901637 is an apocalyptic number.

It is an amenable number.

87901637 is a deficient number, since it is larger than the sum of its proper divisors (1).

87901637 is an equidigital number, since it uses as much as digits as its factorization.

87901637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 87901637 is about 9375.5872882716. The cubic root of 87901637 is about 444.6302310605.

The spelling of 87901637 in words is "eighty-seven million, nine hundred one thousand, six hundred thirty-seven".