61697903 has 2 divisors, whose sum is σ = 61697904. Its totient is φ = 61697902.

The previous prime is 61697873. The next prime is 61697929. The reversal of 61697903 is 30979616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61697903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61697953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30848951 + 30848952.

It is an arithmetic number, because the mean of its divisors is an integer number (30848952).

Almost surely, 2^61697903 is an apocalyptic number.

61697903 is a deficient number, since it is larger than the sum of its proper divisors (1).

61697903 is an equidigital number, since it uses as much as digits as its factorization.

61697903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 61697903 is about 7854.8012705606. The cubic root of 61697903 is about 395.1452822416.

The spelling of 61697903 in words is "sixty-one million, six hundred ninety-seven thousand, nine hundred three".