61631963 has 4 divisors (see below), whose sum is σ = 62102568. Its totient is φ = 61161360.

The previous prime is 61631959. The next prime is 61631971. The reversal of 61631963 is 36913616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61631963 - 2² = 61631959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61631903) 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 in 3 ways as a sum of consecutive naturals, for example, 235106 + ... + 235367.

It is an arithmetic number, because the mean of its divisors is an integer number (15525642).

Almost surely, 2^61631963 is an apocalyptic number.

61631963 is a deficient number, since it is larger than the sum of its proper divisors (470605).

61631963 is a wasteful number, since it uses less digits than its factorization.

61631963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470604.

The product of its digits is 17496, while the sum is 35.

The square root of 61631963 is about 7850.6027157155. The cubic root of 61631963 is about 395.0044607732.

The spelling of 61631963 in words is "sixty-one million, six hundred thirty-one thousand, nine hundred sixty-three".