61979700 has 72 divisors (see below), whose sum is σ = 183738240. Its totient is φ = 16121600.

The previous prime is 61979693. The next prime is 61979713. The reversal of 61979700 is 797916.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9781 + ... + 14819.

It is an arithmetic number, because the mean of its divisors is an integer number (2551920).

Almost surely, 2^61979700 is an apocalyptic number.

61979700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61979700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91869120).

61979700 is an abundant number, since it is smaller than the sum of its proper divisors (121758540).

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

61979700 is a wasteful number, since it uses less digits than its factorization.

61979700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097 (or 5090 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 61979700 is about 7872.7187171904. The cubic root of 61979700 is about 395.7459599088.

The spelling of 61979700 in words is "sixty-one million, nine hundred seventy-nine thousand, seven hundred".