61995091 has 8 divisors (see below), whose sum is σ = 63776160. Its totient is φ = 60219648.

The previous prime is 61995083. The next prime is 61995139. The reversal of 61995091 is 19059916.

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

It is a cyclic number.

It is not a de Polignac number, because 61995091 - 2³ = 61995083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61995041) 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, 31875 + ... + 33763.

It is an arithmetic number, because the mean of its divisors is an integer number (7972020).

Almost surely, 2^61995091 is an apocalyptic number.

61995091 is a deficient number, since it is larger than the sum of its proper divisors (1781069).

61995091 is a wasteful number, since it uses less digits than its factorization.

61995091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 61995091 is about 7873.6961460295. The cubic root of 61995091 is about 395.7787148375.

The spelling of 61995091 in words is "sixty-one million, nine hundred ninety-five thousand, ninety-one".