153120685 has 4 divisors (see below), whose sum is σ = 183744828. Its totient is φ = 122496544.

The previous prime is 153120679. The next prime is 153120701. The reversal of 153120685 is 586021351.

153120685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 114854089 + 38266596 = 10717^2 + 6186^2 .

It is a cyclic number.

It is not a de Polignac number, because 153120685 - 2¹⁵ = 153087917 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15312064 + ... + 15312073.

It is an arithmetic number, because the mean of its divisors is an integer number (45936207).

Almost surely, 2^153120685 is an apocalyptic number.

It is an amenable number.

153120685 is a deficient number, since it is larger than the sum of its proper divisors (30624143).

153120685 is an equidigital number, since it uses as much as digits as its factorization.

153120685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30624142.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 153120685 is about 12374.1943172071. The cubic root of 153120685 is about 534.9887149336.

The spelling of 153120685 in words is "one hundred fifty-three million, one hundred twenty thousand, six hundred eighty-five".