152972909 has 4 divisors (see below), whose sum is σ = 153041916. Its totient is φ = 152903904.

The previous prime is 152972891. The next prime is 152972917. The reversal of 152972909 is 909279251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88924900 + 64048009 = 9430^2 + 8003^2 .

It is a cyclic number.

It is not a de Polignac number, because 152972909 - 2⁸ = 152972653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 152972909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152972929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31064 + ... + 35649.

It is an arithmetic number, because the mean of its divisors is an integer number (38260479).

Almost surely, 2^152972909 is an apocalyptic number.

It is an amenable number.

152972909 is a deficient number, since it is larger than the sum of its proper divisors (69007).

152972909 is an equidigital number, since it uses as much as digits as its factorization.

152972909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69006.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 152972909 is about 12368.2217396035. The cubic root of 152972909 is about 534.8165545688.

The spelling of 152972909 in words is "one hundred fifty-two million, nine hundred seventy-two thousand, nine hundred nine".