61836961 has 4 divisors (see below), whose sum is σ = 63969300. Its totient is φ = 59704624.

The previous prime is 61836941. The next prime is 61836989. The reversal of 61836961 is 16963816.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11696400 + 50140561 = 3420^2 + 7081^2 .

It is a cyclic number.

It is not a de Polignac number, because 61836961 - 2⁹ = 61836449 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61836941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066126 + ... + 1066183.

It is an arithmetic number, because the mean of its divisors is an integer number (15992325).

Almost surely, 2^61836961 is an apocalyptic number.

It is an amenable number.

61836961 is a deficient number, since it is larger than the sum of its proper divisors (2132339).

61836961 is a wasteful number, since it uses less digits than its factorization.

61836961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132338.

The product of its digits is 46656, while the sum is 40.

The square root of 61836961 is about 7863.6480719829. The cubic root of 61836961 is about 395.4419259412.

The spelling of 61836961 in words is "sixty-one million, eight hundred thirty-six thousand, nine hundred sixty-one".