136409501 has 4 divisors (see below), whose sum is σ = 139736604. Its totient is φ = 133082400.

The previous prime is 136409477. The next prime is 136409503. The reversal of 136409501 is 105904631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37884025 + 98525476 = 6155^2 + 9926^2 .

It is a cyclic number.

It is not a de Polignac number, because 136409501 - 2¹⁰ = 136408477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136409503) 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, 1663490 + ... + 1663571.

It is an arithmetic number, because the mean of its divisors is an integer number (34934151).

Almost surely, 2^136409501 is an apocalyptic number.

It is an amenable number.

136409501 is a deficient number, since it is larger than the sum of its proper divisors (3327103).

136409501 is an equidigital number, since it uses as much as digits as its factorization.

136409501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3327102.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 136409501 is about 11679.4478037277. The cubic root of 136409501 is about 514.7719491762.

The spelling of 136409501 in words is "one hundred thirty-six million, four hundred nine thousand, five hundred one".