61831964 has 6 divisors (see below), whose sum is σ = 108205944. Its totient is φ = 30915980.

The previous prime is 61831963. The next prime is 61831999. The reversal of 61831964 is 46913816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61831963) 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, 7728992 + ... + 7728999.

It is an arithmetic number, because the mean of its divisors is an integer number (18034324).

Almost surely, 2^61831964 is an apocalyptic number.

It is an amenable number.

61831964 is a deficient number, since it is larger than the sum of its proper divisors (46373980).

61831964 is a wasteful number, since it uses less digits than its factorization.

61831964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15457995 (or 15457993 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 61831964 is about 7863.3303377131. The cubic root of 61831964 is about 395.4312738625.

The spelling of 61831964 in words is "sixty-one million, eight hundred thirty-one thousand, nine hundred sixty-four".