157939433 has 2 divisors, whose sum is σ = 157939434. Its totient is φ = 157939432.

The previous prime is 157939403. The next prime is 157939493. The reversal of 157939433 is 334939751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116812864 + 41126569 = 10808^2 + 6413^2 .

It is a cyclic number.

It is not a de Polignac number, because 157939433 - 2²⁶ = 90830569 is a prime.

It is a super-3 number, since 3×157939433³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (157939403) 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 as a sum of consecutive naturals, namely, 78969716 + 78969717.

It is an arithmetic number, because the mean of its divisors is an integer number (78969717).

Almost surely, 2^157939433 is an apocalyptic number.

It is an amenable number.

157939433 is a deficient number, since it is larger than the sum of its proper divisors (1).

157939433 is an equidigital number, since it uses as much as digits as its factorization.

157939433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 44.

The square root of 157939433 is about 12567.3956331453. The cubic root of 157939433 is about 540.5429301640.

The spelling of 157939433 in words is "one hundred fifty-seven million, nine hundred thirty-nine thousand, four hundred thirty-three".