61939985 has 8 divisors (see below), whose sum is σ = 74405760. Its totient is φ = 49500144.

The previous prime is 61939979. The next prime is 61939991. The reversal of 61939985 is 58993916.

It is an interprime number because it is at equal distance from previous prime (61939979) and next prime (61939991).

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 61939985 - 2⁸ = 61939729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767 + ... + 11156.

It is an arithmetic number, because the mean of its divisors is an integer number (9300720).

Almost surely, 2^61939985 is an apocalyptic number.

It is an amenable number.

61939985 is a deficient number, since it is larger than the sum of its proper divisors (12465775).

61939985 is a wasteful number, since it uses less digits than its factorization.

61939985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12967.

The product of its digits is 524880, while the sum is 50.

The square root of 61939985 is about 7870.1959950182. The cubic root of 61939985 is about 395.6614138988.

It can be divided in two parts, 619 and 39985, that added together give a palindrome (40604).

The spelling of 61939985 in words is "sixty-one million, nine hundred thirty-nine thousand, nine hundred eighty-five".