152969909 has 4 divisors (see below), whose sum is σ = 153746604. Its totient is φ = 152193216.

The previous prime is 152969899. The next prime is 152969923. The reversal of 152969909 is 909969251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909969251 = 17 ⋅53527603.

It can be written as a sum of positive squares in 2 ways, for example, as 135722500 + 17247409 = 11650^2 + 4153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152969909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152969959) 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, 388052 + ... + 388445.

It is an arithmetic number, because the mean of its divisors is an integer number (38436651).

Almost surely, 2^152969909 is an apocalyptic number.

It is an amenable number.

152969909 is a deficient number, since it is larger than the sum of its proper divisors (776695).

152969909 is an equidigital number, since it uses as much as digits as its factorization.

152969909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776694.

The product of its (nonzero) digits is 393660, while the sum is 50.

The square root of 152969909 is about 12368.1004604588. The cubic root of 152969909 is about 534.8130583938.

The spelling of 152969909 in words is "one hundred fifty-two million, nine hundred sixty-nine thousand, nine hundred nine".