61947964 has 18 divisors (see below), whose sum is σ = 117390840. Its totient is φ = 28591056.

The previous prime is 61947959. The next prime is 61947967. The reversal of 61947964 is 46974916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61947967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45144 + ... + 46495.

Almost surely, 2^61947964 is an apocalyptic number.

It is an amenable number.

61947964 is a deficient number, since it is larger than the sum of its proper divisors (55442876).

61947964 is a wasteful number, since it uses less digits than its factorization.

61947964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91669 (or 91654 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 61947964 is about 7870.7028911019. The cubic root of 61947964 is about 395.6784026386.

The spelling of 61947964 in words is "sixty-one million, nine hundred forty-seven thousand, nine hundred sixty-four".