131637749 has 32 divisors (see below), whose sum is σ = 152165376. Its totient is φ = 113218560.

The previous prime is 131637721. The next prime is 131637767. The reversal of 131637749 is 947736131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131637749 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 (131637799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 838379 + ... + 838535.

It is an arithmetic number, because the mean of its divisors is an integer number (4755168).

Almost surely, 2^131637749 is an apocalyptic number.

It is an amenable number.

131637749 is a deficient number, since it is larger than the sum of its proper divisors (20527627).

131637749 is a wasteful number, since it uses less digits than its factorization.

131637749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its digits is 95256, while the sum is 41.

The square root of 131637749 is about 11473.3495109318. The cubic root of 131637749 is about 508.6981393045.

The spelling of 131637749 in words is "one hundred thirty-one million, six hundred thirty-seven thousand, seven hundred forty-nine".