61499983 has 2 divisors, whose sum is σ = 61499984. Its totient is φ = 61499982.

The previous prime is 61499891. The next prime is 61499989. The reversal of 61499983 is 38999416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61499983 - 2¹⁷ = 61368911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61499989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30749991 + 30749992.

It is an arithmetic number, because the mean of its divisors is an integer number (30749992).

Almost surely, 2^61499983 is an apocalyptic number.

61499983 is a deficient number, since it is larger than the sum of its proper divisors (1).

61499983 is an equidigital number, since it uses as much as digits as its factorization.

61499983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 61499983 is about 7842.1924867986. The cubic root of 61499983 is about 394.7223022783.

The spelling of 61499983 in words is "sixty-one million, four hundred ninety-nine thousand, nine hundred eighty-three".