61680797 has 2 divisors, whose sum is σ = 61680798. Its totient is φ = 61680796.

The previous prime is 61680781. The next prime is 61680799. The reversal of 61680797 is 79708616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36168196 + 25512601 = 6014^2 + 5051^2 .

It is a cyclic number.

It is not a de Polignac number, because 61680797 - 2⁴ = 61680781 is a prime.

Together with 61680799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61680799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30840398 + 30840399.

It is an arithmetic number, because the mean of its divisors is an integer number (30840399).

Almost surely, 2^61680797 is an apocalyptic number.

It is an amenable number.

61680797 is a deficient number, since it is larger than the sum of its proper divisors (1).

61680797 is an equidigital number, since it uses as much as digits as its factorization.

61680797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 61680797 is about 7853.7123069285. The cubic root of 61680797 is about 395.1087603089.

The spelling of 61680797 in words is "sixty-one million, six hundred eighty thousand, seven hundred ninety-seven".