101912731 has 2 divisors, whose sum is σ = 101912732. Its totient is φ = 101912730.

The previous prime is 101912729. The next prime is 101912749. The reversal of 101912731 is 137219101.

It is a weak prime.

It is an emirp because it is prime and its reverse (137219101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101912731 - 2¹ = 101912729 is a prime.

It is a super-2 number, since 2×101912731² = 20772409479756722, which contains 22 as substring.

Together with 101912729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 101912696 and 101912705.

It is not a weakly prime, because it can be changed into another prime (101912771) 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, 50956365 + 50956366.

It is an arithmetic number, because the mean of its divisors is an integer number (50956366).

Almost surely, 2^101912731 is an apocalyptic number.

101912731 is a deficient number, since it is larger than the sum of its proper divisors (1).

101912731 is an equidigital number, since it uses as much as digits as its factorization.

101912731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 101912731 is about 10095.1835545472. The cubic root of 101912731 is about 467.0995833590.

The spelling of 101912731 in words is "one hundred one million, nine hundred twelve thousand, seven hundred thirty-one".