152139291 has 4 divisors (see below), whose sum is σ = 202852392. Its totient is φ = 101426192.

The previous prime is 152139283. The next prime is 152139293. The reversal of 152139291 is 192931251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192931251 = 3 ⋅64310417.

It is a cyclic number.

It is not a de Polignac number, because 152139291 - 2³ = 152139283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (152139293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25356546 + ... + 25356551.

It is an arithmetic number, because the mean of its divisors is an integer number (50713098).

Almost surely, 2^152139291 is an apocalyptic number.

152139291 is a deficient number, since it is larger than the sum of its proper divisors (50713101).

152139291 is an equidigital number, since it uses as much as digits as its factorization.

152139291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50713100.

The product of its digits is 4860, while the sum is 33.

The square root of 152139291 is about 12334.4757083550. The cubic root of 152139291 is about 533.8432994181.

The spelling of 152139291 in words is "one hundred fifty-two million, one hundred thirty-nine thousand, two hundred ninety-one".