19249961 has 2 divisors, whose sum is σ = 19249962. Its totient is φ = 19249960.

The previous prime is 19249957. The next prime is 19249981. The reversal of 19249961 is 16994291.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16152361 + 3097600 = 4019^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 19249961 - 2² = 19249957 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19249921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9624980 + 9624981.

It is an arithmetic number, because the mean of its divisors is an integer number (9624981).

Almost surely, 2^19249961 is an apocalyptic number.

It is an amenable number.

19249961 is a deficient number, since it is larger than the sum of its proper divisors (1).

19249961 is an equidigital number, since it uses as much as digits as its factorization.

19249961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 19249961 is about 4387.4777492313. The cubic root of 19249961 is about 268.0052395575.

The spelling of 19249961 in words is "nineteen million, two hundred forty-nine thousand, nine hundred sixty-one".