61812797 has 2 divisors, whose sum is σ = 61812798. Its totient is φ = 61812796.

The previous prime is 61812769. The next prime is 61812841. The reversal of 61812797 is 79721816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32501401 + 29311396 = 5701^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 61812797 - 2¹² = 61808701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61812197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30906398 + 30906399.

It is an arithmetic number, because the mean of its divisors is an integer number (30906399).

Almost surely, 2^61812797 is an apocalyptic number.

It is an amenable number.

61812797 is a deficient number, since it is larger than the sum of its proper divisors (1).

61812797 is an equidigital number, since it uses as much as digits as its factorization.

61812797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 61812797 is about 7862.1114848366. Note that the first 3 decimals coincide. The cubic root of 61812797 is about 395.3904103456.

The spelling of 61812797 in words is "sixty-one million, eight hundred twelve thousand, seven hundred ninety-seven".