137661799 has 8 divisors (see below), whose sum is σ = 150417792. Its totient is φ = 124946040.

The previous prime is 137661787. The next prime is 137661833. The reversal of 137661799 is 997166731.

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 137661799 - 2⁹ = 137661287 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 (137661749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659 + ... + 16804.

It is an arithmetic number, because the mean of its divisors is an integer number (18802224).

Almost surely, 2^137661799 is an apocalyptic number.

137661799 is a deficient number, since it is larger than the sum of its proper divisors (12755993).

137661799 is a wasteful number, since it uses less digits than its factorization.

137661799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20117.

The product of its digits is 428652, while the sum is 49.

The square root of 137661799 is about 11732.9365037061. The cubic root of 137661799 is about 516.3424291470.

The spelling of 137661799 in words is "one hundred thirty-seven million, six hundred sixty-one thousand, seven hundred ninety-nine".