61983591 has 8 divisors (see below), whose sum is σ = 82685184. Its totient is φ = 41302200.

The previous prime is 61983589. The next prime is 61983611. The reversal of 61983591 is 19538916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61983591 - 2¹ = 61983589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61983191) 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, 4930 + ... + 12176.

It is an arithmetic number, because the mean of its divisors is an integer number (10335648).

Almost surely, 2^61983591 is an apocalyptic number.

61983591 is a deficient number, since it is larger than the sum of its proper divisors (20701593).

61983591 is a wasteful number, since it uses less digits than its factorization.

61983591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101.

The product of its digits is 58320, while the sum is 42.

The square root of 61983591 is about 7872.9658325183. The cubic root of 61983591 is about 395.7542411972.

The spelling of 61983591 in words is "sixty-one million, nine hundred eighty-three thousand, five hundred ninety-one".