61912085 has 4 divisors (see below), whose sum is σ = 74294508. Its totient is φ = 49529664.

The previous prime is 61912043. The next prime is 61912099. The reversal of 61912085 is 58021916.

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 32741284 + 29170801 = 5722^2 + 5401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61912085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6191204 + ... + 6191213.

It is an arithmetic number, because the mean of its divisors is an integer number (18573627).

Almost surely, 2^61912085 is an apocalyptic number.

It is an amenable number.

61912085 is a deficient number, since it is larger than the sum of its proper divisors (12382423).

61912085 is a wasteful number, since it uses less digits than its factorization.

61912085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12382422.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 61912085 is about 7868.4232855128. The cubic root of 61912085 is about 395.6019982601.

The spelling of 61912085 in words is "sixty-one million, nine hundred twelve thousand, eighty-five".