612097909 has 2 divisors, whose sum is σ = 612097910. Its totient is φ = 612097908.

The previous prime is 612097861. The next prime is 612097921. The reversal of 612097909 is 909790216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464402500 + 147695409 = 21550^2 + 12153^2 .

It is a cyclic number.

It is not a de Polignac number, because 612097909 - 2⁹ = 612097397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612095909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306048954 + 306048955.

It is an arithmetic number, because the mean of its divisors is an integer number (306048955).

Almost surely, 2^612097909 is an apocalyptic number.

It is an amenable number.

612097909 is a deficient number, since it is larger than the sum of its proper divisors (1).

612097909 is an equidigital number, since it uses as much as digits as its factorization.

612097909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 612097909 is about 24740.6125429424. The cubic root of 612097909 is about 849.0637483619.

The spelling of 612097909 in words is "six hundred twelve million, ninety-seven thousand, nine hundred nine".