102113731 has 2 divisors, whose sum is σ = 102113732. Its totient is φ = 102113730.

The previous prime is 102113729. The next prime is 102113749. The reversal of 102113731 is 137311201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102113731 - 2¹ = 102113729 is a prime.

It is a super-2 number, since 2×102113731² = 20854428117480722, which contains 22 as substring.

Together with 102113729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 102113699 and 102113708.

It is not a weakly prime, because it can be changed into another prime (102113131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51056865 + 51056866.

It is an arithmetic number, because the mean of its divisors is an integer number (51056866).

Almost surely, 2^102113731 is an apocalyptic number.

102113731 is a deficient number, since it is larger than the sum of its proper divisors (1).

102113731 is an equidigital number, since it uses as much as digits as its factorization.

102113731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 102113731 is about 10105.1338932248. The cubic root of 102113731 is about 467.4064647439.

Adding to 102113731 its reverse (137311201), we get a palindrome (239424932).

The spelling of 102113731 in words is "one hundred two million, one hundred thirteen thousand, seven hundred thirty-one".