157949149 has 4 divisors (see below), whose sum is σ = 157974300. Its totient is φ = 157924000.

The previous prime is 157949131. The next prime is 157949213. The reversal of 157949149 is 941949751.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 77757124 + 80192025 = 8818^2 + 8955^2 .

It is a cyclic number.

It is not a de Polignac number, because 157949149 - 2⁵ = 157949117 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 (157949749) 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, 5649 + ... + 18649.

It is an arithmetic number, because the mean of its divisors is an integer number (39493575).

Almost surely, 2^157949149 is an apocalyptic number.

It is an amenable number.

157949149 is a deficient number, since it is larger than the sum of its proper divisors (25151).

157949149 is a wasteful number, since it uses less digits than its factorization.

157949149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25150.

The product of its digits is 408240, while the sum is 49.

The square root of 157949149 is about 12567.7821830266. The cubic root of 157949149 is about 540.5540141753.

The spelling of 157949149 in words is "one hundred fifty-seven million, nine hundred forty-nine thousand, one hundred forty-nine".