61697401 has 2 divisors, whose sum is σ = 61697402. Its totient is φ = 61697400.

The previous prime is 61697387. The next prime is 61697411. The reversal of 61697401 is 10479616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52577001 + 9120400 = 7251^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 61697401 - 2¹¹ = 61695353 is a prime.

It is not a weakly prime, because it can be changed into another prime (61697411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30848700 + 30848701.

It is an arithmetic number, because the mean of its divisors is an integer number (30848701).

Almost surely, 2^61697401 is an apocalyptic number.

It is an amenable number.

61697401 is a deficient number, since it is larger than the sum of its proper divisors (1).

61697401 is an equidigital number, since it uses as much as digits as its factorization.

61697401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 61697401 is about 7854.7693155178. The cubic root of 61697401 is about 395.1442105494.

The spelling of 61697401 in words is "sixty-one million, six hundred ninety-seven thousand, four hundred one".