612090691 has 6 divisors (see below), whose sum is σ = 632473476. Its totient is φ = 592344900.

The previous prime is 612090649. The next prime is 612090701. The reversal of 612090691 is 196090216.

612090691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 612090691 - 2⁹ = 612090179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612090601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 317505 + ... + 319426.

It is an arithmetic number, because the mean of its divisors is an integer number (105412246).

Almost surely, 2^612090691 is an apocalyptic number.

612090691 is a deficient number, since it is larger than the sum of its proper divisors (20382785).

612090691 is an equidigital number, since it uses as much as digits as its factorization.

612090691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636993 (or 636962 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 612090691 is about 24740.4666690020. The cubic root of 612090691 is about 849.0604108968.

The spelling of 612090691 in words is "six hundred twelve million, ninety thousand, six hundred ninety-one".