102491113 has 8 divisors (see below), whose sum is σ = 109482408. Its totient is φ = 95606784.

The previous prime is 102491071. The next prime is 102491117. The reversal of 102491113 is 311194201.

It can be written as a sum of positive squares in 4 ways, for example, as 19079424 + 83411689 = 4368^2 + 9133^2 .

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-102491113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102491117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24756 + ... + 28597.

It is an arithmetic number, because the mean of its divisors is an integer number (13685301).

Almost surely, 2^102491113 is an apocalyptic number.

It is an amenable number.

102491113 is a deficient number, since it is larger than the sum of its proper divisors (6991295).

102491113 is a wasteful number, since it uses less digits than its factorization.

102491113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53483.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 102491113 is about 10123.7894584982. The cubic root of 102491113 is about 467.9815553278.

The spelling of 102491113 in words is "one hundred two million, four hundred ninety-one thousand, one hundred thirteen".