152640091 has 4 divisors (see below), whose sum is σ = 160673800. Its totient is φ = 144606384.

The previous prime is 152640049. The next prime is 152640097. The reversal of 152640091 is 190046251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190046251 = 29 ⋅6553319.

It is a cyclic number.

It is not a de Polignac number, because 152640091 - 2²³ = 144251483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152640097) 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, 4016826 + ... + 4016863.

It is an arithmetic number, because the mean of its divisors is an integer number (40168450).

Almost surely, 2^152640091 is an apocalyptic number.

152640091 is a deficient number, since it is larger than the sum of its proper divisors (8033709).

152640091 is an equidigital number, since it uses as much as digits as its factorization.

152640091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8033708.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 152640091 is about 12354.7598519761. The cubic root of 152640091 is about 534.4284121617.

The spelling of 152640091 in words is "one hundred fifty-two million, six hundred forty thousand, ninety-one".