61917090 has 16 divisors (see below), whose sum is σ = 148601088. Its totient is φ = 16511216.

The previous prime is 61917083. The next prime is 61917103. The reversal of 61917090 is 9071916.

61917090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031922 + ... + 1031981.

It is an arithmetic number, because the mean of its divisors is an integer number (9287568).

Almost surely, 2^61917090 is an apocalyptic number.

61917090 is an abundant number, since it is smaller than the sum of its proper divisors (86683998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61917090 is a wasteful number, since it uses less digits than its factorization.

61917090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063913.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 61917090 is about 7868.7413224734. The cubic root of 61917090 is about 395.6126581856.

The spelling of 61917090 in words is "sixty-one million, nine hundred seventeen thousand, ninety".