612990133 has 4 divisors (see below), whose sum is σ = 700560160. Its totient is φ = 525420108.

The previous prime is 612990127. The next prime is 612990163. The reversal of 612990133 is 331099216.

612990133 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 612990133 - 2⁵ = 612990101 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 (612990113) 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, 43785003 + ... + 43785016.

It is an arithmetic number, because the mean of its divisors is an integer number (175140040).

Almost surely, 2^612990133 is an apocalyptic number.

It is an amenable number.

612990133 is a deficient number, since it is larger than the sum of its proper divisors (87570027).

612990133 is an equidigital number, since it uses as much as digits as its factorization.

612990133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87570026.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 612990133 is about 24758.6375432898. The cubic root of 612990133 is about 849.4760937603.

The spelling of 612990133 in words is "six hundred twelve million, nine hundred ninety thousand, one hundred thirty-three".