61697357 has 2 divisors, whose sum is σ = 61697358. Its totient is φ = 61697356.

The previous prime is 61697281. The next prime is 61697359. The reversal of 61697357 is 75379616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61559716 + 137641 = 7846^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 61697357 - 2⁸ = 61697101 is a prime.

Together with 61697359, 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 (61697359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30848678 + 30848679.

It is an arithmetic number, because the mean of its divisors is an integer number (30848679).

Almost surely, 2^61697357 is an apocalyptic number.

It is an amenable number.

61697357 is a deficient number, since it is larger than the sum of its proper divisors (1).

61697357 is an equidigital number, since it uses as much as digits as its factorization.

61697357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 44.

The square root of 61697357 is about 7854.7665146712. The cubic root of 61697357 is about 395.1441166160.

The spelling of 61697357 in words is "sixty-one million, six hundred ninety-seven thousand, three hundred fifty-seven".