137490661 has 8 divisors (see below), whose sum is σ = 171417024. Its totient is φ = 107135520.

The previous prime is 137490649. The next prime is 137490697. The reversal of 137490661 is 166094731.

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 137490661 - 2⁵ = 137490629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137490661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137490641) 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, 892720 + ... + 892873.

It is an arithmetic number, because the mean of its divisors is an integer number (21427128).

Almost surely, 2^137490661 is an apocalyptic number.

137490661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137490661 is a deficient number, since it is larger than the sum of its proper divisors (33926363).

137490661 is a wasteful number, since it uses less digits than its factorization.

137490661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785611.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 137490661 is about 11725.6411764986. The cubic root of 137490661 is about 516.1283720527.

The spelling of 137490661 in words is "one hundred thirty-seven million, four hundred ninety thousand, six hundred sixty-one".