61959621 has 8 divisors (see below), whose sum is σ = 83658880. Its totient is φ = 40783392.

The previous prime is 61959613. The next prime is 61959629. The reversal of 61959621 is 12695916.

It is an interprime number because it is at equal distance from previous prime (61959613) and next prime (61959629).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61959621 - 2³ = 61959613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61959621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61959629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130480 + ... + 130953.

It is an arithmetic number, because the mean of its divisors is an integer number (10457360).

Almost surely, 2^61959621 is an apocalyptic number.

It is an amenable number.

61959621 is a deficient number, since it is larger than the sum of its proper divisors (21699259).

61959621 is a wasteful number, since it uses less digits than its factorization.

61959621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261515.

The product of its digits is 29160, while the sum is 39.

The square root of 61959621 is about 7871.4433873337. The cubic root of 61959621 is about 395.7032198861.

The spelling of 61959621 in words is "sixty-one million, nine hundred fifty-nine thousand, six hundred twenty-one".