137632661 has 4 divisors (see below), whose sum is σ = 138683424. Its totient is φ = 136581900.

The previous prime is 137632643. The next prime is 137632717. The reversal of 137632661 is 166236731.

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 137632661 - 2¹⁴ = 137616277 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 (137634661) 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, 525185 + ... + 525446.

It is an arithmetic number, because the mean of its divisors is an integer number (34670856).

Almost surely, 2^137632661 is an apocalyptic number.

It is an amenable number.

137632661 is a deficient number, since it is larger than the sum of its proper divisors (1050763).

137632661 is a wasteful number, since it uses less digits than its factorization.

137632661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050762.

The product of its digits is 27216, while the sum is 35.

The square root of 137632661 is about 11731.6947198604. The cubic root of 137632661 is about 516.3059962672.

The spelling of 137632661 in words is "one hundred thirty-seven million, six hundred thirty-two thousand, six hundred sixty-one".