61187983 has 2 divisors, whose sum is σ = 61187984. Its totient is φ = 61187982.

The previous prime is 61187977. The next prime is 61187989. The reversal of 61187983 is 38978116.

It is a balanced prime because it is at equal distance from previous prime (61187977) and next prime (61187989).

It is a cyclic number.

It is not a de Polignac number, because 61187983 - 2²¹ = 59090831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61187989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30593991 + 30593992.

It is an arithmetic number, because the mean of its divisors is an integer number (30593992).

Almost surely, 2^61187983 is an apocalyptic number.

61187983 is a deficient number, since it is larger than the sum of its proper divisors (1).

61187983 is an equidigital number, since it uses as much as digits as its factorization.

61187983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 61187983 is about 7822.2747970140. The cubic root of 61187983 is about 394.0536722471.

The spelling of 61187983 in words is "sixty-one million, one hundred eighty-seven thousand, nine hundred eighty-three".