61989903 has 6 divisors (see below), whose sum is σ = 89540984. Its totient is φ = 41326596.

The previous prime is 61989877. The next prime is 61989919. The reversal of 61989903 is 30998916.

It is not a de Polignac number, because 61989903 - 2⁶ = 61989839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61989923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3443875 + ... + 3443892.

Almost surely, 2^61989903 is an apocalyptic number.

61989903 is a deficient number, since it is larger than the sum of its proper divisors (27551081).

61989903 is a wasteful number, since it uses less digits than its factorization.

61989903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887773 (or 6887770 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 61989903 is about 7873.3666877645. The cubic root of 61989903 is about 395.7676744083.

The spelling of 61989903 in words is "sixty-one million, nine hundred eighty-nine thousand, nine hundred three".