136190731 has 2 divisors, whose sum is σ = 136190732. Its totient is φ = 136190730.

The previous prime is 136190729. The next prime is 136190753. The reversal of 136190731 is 137091631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136190731 - 2¹ = 136190729 is a prime.

It is a super-2 number, since 2×136190731² = 37095830420628722, which contains 22 as substring.

Together with 136190729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 136190693 and 136190702.

It is not a weakly prime, because it can be changed into another prime (136190701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68095365 + 68095366.

It is an arithmetic number, because the mean of its divisors is an integer number (68095366).

Almost surely, 2^136190731 is an apocalyptic number.

136190731 is a deficient number, since it is larger than the sum of its proper divisors (1).

136190731 is an equidigital number, since it uses as much as digits as its factorization.

136190731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 136190731 is about 11670.0784487509. The cubic root of 136190731 is about 514.4966093206.

The spelling of 136190731 in words is "one hundred thirty-six million, one hundred ninety thousand, seven hundred thirty-one".