612121575797 has 2 divisors, whose sum is σ = 612121575798. Its totient is φ = 612121575796.

The previous prime is 612121575787. The next prime is 612121575829. The reversal of 612121575797 is 797575121216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 550431931921 + 61689643876 = 741911^2 + 248374^2 .

It is a cyclic number.

It is not a de Polignac number, because 612121575797 - 2⁴ = 612121575781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612121575787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306060787898 + 306060787899.

It is an arithmetic number, because the mean of its divisors is an integer number (306060787899).

Almost surely, 2^612121575797 is an apocalyptic number.

It is an amenable number.

612121575797 is a deficient number, since it is larger than the sum of its proper divisors (1).

612121575797 is an equidigital number, since it uses as much as digits as its factorization.

612121575797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1852200, while the sum is 53.

The spelling of 612121575797 in words is "six hundred twelve billion, one hundred twenty-one million, five hundred seventy-five thousand, seven hundred ninety-seven".