136401397 has 4 divisors (see below), whose sum is σ = 148801536. Its totient is φ = 124001260.

The previous prime is 136401389. The next prime is 136401427. The reversal of 136401397 is 793104631.

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 136401397 - 2³ = 136401389 is a prime.

It is a super-2 number, since 2×136401397² = 37210682207103218, 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 (136401337) 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, 6200053 + ... + 6200074.

It is an arithmetic number, because the mean of its divisors is an integer number (37200384).

Almost surely, 2^136401397 is an apocalyptic number.

It is an amenable number.

136401397 is a deficient number, since it is larger than the sum of its proper divisors (12400139).

136401397 is a wasteful number, since it uses less digits than its factorization.

136401397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12400138.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 136401397 is about 11679.1008643645. The cubic root of 136401397 is about 514.7617548851.

The spelling of 136401397 in words is "one hundred thirty-six million, four hundred one thousand, three hundred ninety-seven".