61987734 has 16 divisors (see below), whose sum is σ = 137750640. Its totient is φ = 20662560.

The previous prime is 61987721. The next prime is 61987789. The reversal of 61987734 is 43778916.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61987734.

It is a congruent 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, 573907 + ... + 574014.

It is an arithmetic number, because the mean of its divisors is an integer number (8609415).

Almost surely, 2^61987734 is an apocalyptic number.

61987734 is an abundant number, since it is smaller than the sum of its proper divisors (75762906).

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

61987734 is a wasteful number, since it uses less digits than its factorization.

61987734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147932 (or 1147926 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 61987734 is about 7873.2289437054. The cubic root of 61987734 is about 395.7630584410.

The spelling of 61987734 in words is "sixty-one million, nine hundred eighty-seven thousand, seven hundred thirty-four".