137445661 has 8 divisors (see below), whose sum is σ = 142919424. Its totient is φ = 132036960.

The previous prime is 137445647. The next prime is 137445667. The reversal of 137445661 is 166544731.

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 137445661 - 2⁷ = 137445533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137445661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137445667) 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, 11935 + ... + 20428.

It is an arithmetic number, because the mean of its divisors is an integer number (17864928).

Almost surely, 2^137445661 is an apocalyptic number.

It is an amenable number.

137445661 is a deficient number, since it is larger than the sum of its proper divisors (5473763).

137445661 is a wasteful number, since it uses less digits than its factorization.

137445661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32531.

The product of its digits is 60480, while the sum is 37.

The square root of 137445661 is about 11723.7221478505. The cubic root of 137445661 is about 516.0720571706.

The spelling of 137445661 in words is "one hundred thirty-seven million, four hundred forty-five thousand, six hundred sixty-one".