136437431 has 8 divisors (see below), whose sum is σ = 151999680. Its totient is φ = 121599072.

The previous prime is 136437401. The next prime is 136437437. The reversal of 136437431 is 134734631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136437431 - 2²² = 132243127 is a prime.

It is a super-2 number, since 2×136437431² = 37230345155759522, 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 (136437437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180575 + ... + 181328.

It is an arithmetic number, because the mean of its divisors is an integer number (18999960).

Almost surely, 2^136437431 is an apocalyptic number.

136437431 is a deficient number, since it is larger than the sum of its proper divisors (15562249).

136437431 is a wasteful number, since it uses less digits than its factorization.

136437431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361945.

The product of its digits is 18144, while the sum is 32.

The square root of 136437431 is about 11680.6434326196. The cubic root of 136437431 is about 514.8070801587.

The spelling of 136437431 in words is "one hundred thirty-six million, four hundred thirty-seven thousand, four hundred thirty-one".