149551537 has 4 divisors (see below), whose sum is σ = 149745780. Its totient is φ = 149357296.

The previous prime is 149551453. The next prime is 149551541. The reversal of 149551537 is 735155941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76807696 + 72743841 = 8764^2 + 8529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149551537 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 149551537.

It is not an unprimeable number, because it can be changed into a prime (149551547) 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, 95962 + ... + 97507.

It is an arithmetic number, because the mean of its divisors is an integer number (37436445).

Almost surely, 2^149551537 is an apocalyptic number.

It is an amenable number.

149551537 is a deficient number, since it is larger than the sum of its proper divisors (194243).

149551537 is an equidigital number, since it uses as much as digits as its factorization.

149551537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194242.

The product of its digits is 94500, while the sum is 40.

The square root of 149551537 is about 12229.1265836935. The cubic root of 149551537 is about 530.7992415072.

The spelling of 149551537 in words is "one hundred forty-nine million, five hundred fifty-one thousand, five hundred thirty-seven".