61998049 has 2 divisors, whose sum is σ = 61998050. Its totient is φ = 61998048.

The previous prime is 61998037. The next prime is 61998071. The reversal of 61998049 is 94089916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56731024 + 5267025 = 7532^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 61998049 - 2⁵ = 61998017 is a prime.

It is not a weakly prime, because it can be changed into another prime (61998019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30999024 + 30999025.

It is an arithmetic number, because the mean of its divisors is an integer number (30999025).

Almost surely, 2^61998049 is an apocalyptic number.

It is an amenable number.

61998049 is a deficient number, since it is larger than the sum of its proper divisors (1).

61998049 is an equidigital number, since it uses as much as digits as its factorization.

61998049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 61998049 is about 7873.8839844133. The cubic root of 61998049 is about 395.7850093941.

The spelling of 61998049 in words is "sixty-one million, nine hundred ninety-eight thousand, forty-nine".