137510661 has 4 divisors (see below), whose sum is σ = 183347552. Its totient is φ = 91673772.

The previous prime is 137510623. The next prime is 137510683. The reversal of 137510661 is 166015731.

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 not a de Polignac number, because 137510661 - 2¹⁴ = 137494277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137510621) 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, 22918441 + ... + 22918446.

It is an arithmetic number, because the mean of its divisors is an integer number (45836888).

Almost surely, 2^137510661 is an apocalyptic number.

It is an amenable number.

137510661 is a deficient number, since it is larger than the sum of its proper divisors (45836891).

137510661 is an equidigital number, since it uses as much as digits as its factorization.

137510661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45836890.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 137510661 is about 11726.4939773148. The cubic root of 137510661 is about 516.1533969450.

The spelling of 137510661 in words is "one hundred thirty-seven million, five hundred ten thousand, six hundred sixty-one".