102631789 has 8 divisors (see below), whose sum is σ = 110683160. Its totient is φ = 94602816.

The previous prime is 102631759. The next prime is 102631799. The reversal of 102631789 is 987136201.

It can be written as a sum of positive squares in 4 ways, for example, as 32775625 + 69856164 = 5725^2 + 8358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102631789 is a prime.

It is a super-2 number, since 2×102631789² = 21066568226681042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102631709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4627 + ... + 15055.

It is an arithmetic number, because the mean of its divisors is an integer number (13835395).

Almost surely, 2^102631789 is an apocalyptic number.

It is an amenable number.

102631789 is a deficient number, since it is larger than the sum of its proper divisors (8051371).

102631789 is a wasteful number, since it uses less digits than its factorization.

102631789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11199.

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

The square root of 102631789 is about 10130.7348696923. The cubic root of 102631789 is about 468.1955695770.

The spelling of 102631789 in words is "one hundred two million, six hundred thirty-one thousand, seven hundred eighty-nine".