61697929 has 2 divisors, whose sum is σ = 61697930. Its totient is φ = 61697928.

The previous prime is 61697903. The next prime is 61697953. The reversal of 61697929 is 92979616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54686025 + 7011904 = 7395^2 + 2648^2 .

It is a cyclic number.

It is not a de Polignac number, because 61697929 - 2¹³ = 61689737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61697969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30848964 + 30848965.

It is an arithmetic number, because the mean of its divisors is an integer number (30848965).

Almost surely, 2^61697929 is an apocalyptic number.

It is an amenable number.

61697929 is a deficient number, since it is larger than the sum of its proper divisors (1).

61697929 is an equidigital number, since it uses as much as digits as its factorization.

61697929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 61697929 is about 7854.8029255991. The cubic root of 61697929 is about 395.1453377474.

It can be divided in two parts, 61697 and 929, that added together give a palindrome (62626).

The spelling of 61697929 in words is "sixty-one million, six hundred ninety-seven thousand, nine hundred twenty-nine".