61941621 has 16 divisors (see below), whose sum is σ = 94552704. Its totient is φ = 35333184.

The previous prime is 61941617. The next prime is 61941661. The reversal of 61941621 is 12614916.

It is a happy number.

It is not a de Polignac number, because 61941621 - 2² = 61941617 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61941601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11455 + ... + 15971.

It is an arithmetic number, because the mean of its divisors is an integer number (5909544).

Almost surely, 2^61941621 is an apocalyptic number.

It is an amenable number.

61941621 is a deficient number, since it is larger than the sum of its proper divisors (32611083).

61941621 is a wasteful number, since it uses less digits than its factorization.

61941621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180.

The product of its digits is 2592, while the sum is 30.

The square root of 61941621 is about 7870.2999307523. The cubic root of 61941621 is about 395.6648973587.

The spelling of 61941621 in words is "sixty-one million, nine hundred forty-one thousand, six hundred twenty-one".