102891637 has 2 divisors, whose sum is σ = 102891638. Its totient is φ = 102891636.

The previous prime is 102891619. The next prime is 102891641. The reversal of 102891637 is 736198201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101727396 + 1164241 = 10086^2 + 1079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102891637 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102891596 and 102891605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102891617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51445818 + 51445819.

It is an arithmetic number, because the mean of its divisors is an integer number (51445819).

Almost surely, 2^102891637 is an apocalyptic number.

It is an amenable number.

102891637 is a deficient number, since it is larger than the sum of its proper divisors (1).

102891637 is an equidigital number, since it uses as much as digits as its factorization.

102891637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 102891637 is about 10143.5514983658. The cubic root of 102891637 is about 468.5903697753.

It can be divided in two parts, 1028 and 91637, that added together give a triangular number (92665 = T₄₃₀).

The spelling of 102891637 in words is "one hundred two million, eight hundred ninety-one thousand, six hundred thirty-seven".