61998727 has 8 divisors (see below), whose sum is σ = 71084576. Its totient is φ = 52970112.

The previous prime is 61998721. The next prime is 61998799. The reversal of 61998727 is 72789916.

It is a happy number.

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 61998727 - 2³ = 61998719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61998721) 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, 11958 + ... + 16339.

It is an arithmetic number, because the mean of its divisors is an integer number (8885572).

Almost surely, 2^61998727 is an apocalyptic number.

61998727 is a deficient number, since it is larger than the sum of its proper divisors (9085849).

61998727 is a wasteful number, since it uses less digits than its factorization.

61998727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28617.

The product of its digits is 381024, while the sum is 49.

The square root of 61998727 is about 7873.9270380160. The cubic root of 61998727 is about 395.7864521344.

The spelling of 61998727 in words is "sixty-one million, nine hundred ninety-eight thousand, seven hundred twenty-seven".