61508983 has 2 divisors, whose sum is σ = 61508984. Its totient is φ = 61508982.

The previous prime is 61508957. The next prime is 61508987. The reversal of 61508983 is 38980516.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61508983 - 2⁹ = 61508471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61508987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30754491 + 30754492.

It is an arithmetic number, because the mean of its divisors is an integer number (30754492).

Almost surely, 2^61508983 is an apocalyptic number.

61508983 is a deficient number, since it is larger than the sum of its proper divisors (1).

61508983 is an equidigital number, since it uses as much as digits as its factorization.

61508983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 61508983 is about 7842.7662849278. The cubic root of 61508983 is about 394.7415560909.

The spelling of 61508983 in words is "sixty-one million, five hundred eight thousand, nine hundred eighty-three".