157942949 has 4 divisors (see below), whose sum is σ = 158398464. Its totient is φ = 157487436.

The previous prime is 157942943. The next prime is 157942951. The reversal of 157942949 is 949249751.

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 157942949 - 2⁴ = 157942933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157942897 and 157942906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157942943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227237 + ... + 227930.

It is an arithmetic number, because the mean of its divisors is an integer number (39599616).

Almost surely, 2^157942949 is an apocalyptic number.

It is an amenable number.

157942949 is a deficient number, since it is larger than the sum of its proper divisors (455515).

157942949 is an equidigital number, since it uses as much as digits as its factorization.

157942949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455514.

The product of its digits is 816480, while the sum is 50.

The square root of 157942949 is about 12567.5355181515. The cubic root of 157942949 is about 540.5469412687.

The spelling of 157942949 in words is "one hundred fifty-seven million, nine hundred forty-two thousand, nine hundred forty-nine".