152705891 has 4 divisors (see below), whose sum is σ = 164452512. Its totient is φ = 140959272.

The previous prime is 152705887. The next prime is 152705897. The reversal of 152705891 is 198507251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198507251 = 2909 ⋅68239.

It is a cyclic number.

It is not a de Polignac number, because 152705891 - 2² = 152705887 is a prime.

It is a super-2 number, since 2×152705891² = 46638178292207762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152705897) 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, 5873291 + ... + 5873316.

It is an arithmetic number, because the mean of its divisors is an integer number (41113128).

Almost surely, 2^152705891 is an apocalyptic number.

152705891 is a deficient number, since it is larger than the sum of its proper divisors (11746621).

152705891 is a wasteful number, since it uses less digits than its factorization.

152705891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11746620.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 152705891 is about 12357.4225063320. The cubic root of 152705891 is about 534.5051948240.

The spelling of 152705891 in words is "one hundred fifty-two million, seven hundred five thousand, eight hundred ninety-one".