137812661 has 8 divisors (see below), whose sum is σ = 159030144. Its totient is φ = 116977680.

The previous prime is 137812651. The next prime is 137812663. The reversal of 137812661 is 166218731.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137812661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137812663) 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, 94850 + ... + 96291.

It is an arithmetic number, because the mean of its divisors is an integer number (19878768).

Almost surely, 2^137812661 is an apocalyptic number.

It is an amenable number.

137812661 is a deficient number, since it is larger than the sum of its proper divisors (21217483).

137812661 is a wasteful number, since it uses less digits than its factorization.

137812661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191251.

The product of its digits is 12096, while the sum is 35.

The square root of 137812661 is about 11739.3637391470. The cubic root of 137812661 is about 516.5309782196.

The spelling of 137812661 in words is "one hundred thirty-seven million, eight hundred twelve thousand, six hundred sixty-one".