136490381 has 4 divisors (see below), whose sum is σ = 136555200. Its totient is φ = 136425564.

The previous prime is 136490371. The next prime is 136490383. The reversal of 136490381 is 183094631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136490381 - 2²⁶ = 69381517 is a prime.

It is a super-2 number, since 2×136490381² = 37259248211050322, 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 (136490383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29141 + ... + 33498.

It is an arithmetic number, because the mean of its divisors is an integer number (34138800).

Almost surely, 2^136490381 is an apocalyptic number.

It is an amenable number.

136490381 is a deficient number, since it is larger than the sum of its proper divisors (64819).

136490381 is an equidigital number, since it uses as much as digits as its factorization.

136490381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64818.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 136490381 is about 11682.9097830977. The cubic root of 136490381 is about 514.8736687020.

The spelling of 136490381 in words is "one hundred thirty-six million, four hundred ninety thousand, three hundred eighty-one".