61887983 has 4 divisors (see below), whose sum is σ = 63397488. Its totient is φ = 60378480.

The previous prime is 61887979. The next prime is 61888031. The reversal of 61887983 is 38978816.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61887983 - 2² = 61887979 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 (61887083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754691 + ... + 754772.

It is an arithmetic number, because the mean of its divisors is an integer number (15849372).

Almost surely, 2^61887983 is an apocalyptic number.

61887983 is a deficient number, since it is larger than the sum of its proper divisors (1509505).

61887983 is a wasteful number, since it uses less digits than its factorization.

61887983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509504.

The product of its digits is 580608, while the sum is 50.

The square root of 61887983 is about 7866.8915716438. The cubic root of 61887983 is about 395.5506564425.

The spelling of 61887983 in words is "sixty-one million, eight hundred eighty-seven thousand, nine hundred eighty-three".