149538557 has 4 divisors (see below), whose sum is σ = 170901216. Its totient is φ = 128175900.

The previous prime is 149538551. The next prime is 149538559. The reversal of 149538557 is 755835941.

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 a cyclic number.

It is not a de Polignac number, because 149538557 - 2⁴ = 149538541 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 (149538551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10681319 + ... + 10681332.

It is an arithmetic number, because the mean of its divisors is an integer number (42725304).

Almost surely, 2^149538557 is an apocalyptic number.

It is an amenable number.

149538557 is a deficient number, since it is larger than the sum of its proper divisors (21362659).

149538557 is an equidigital number, since it uses as much as digits as its factorization.

149538557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21362658.

The product of its digits is 756000, while the sum is 47.

The square root of 149538557 is about 12228.5958719716. The cubic root of 149538557 is about 530.7838845415.

The spelling of 149538557 in words is "one hundred forty-nine million, five hundred thirty-eight thousand, five hundred fifty-seven".