19973461 has 2 divisors, whose sum is σ = 19973462. Its totient is φ = 19973460.

The previous prime is 19973423. The next prime is 19973479. The reversal of 19973461 is 16437991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10400625 + 9572836 = 3225^2 + 3094^2 .

It is a cyclic number.

It is not a de Polignac number, because 19973461 - 2⁹ = 19972949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19976461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986730 + 9986731.

It is an arithmetic number, because the mean of its divisors is an integer number (9986731).

Almost surely, 2^19973461 is an apocalyptic number.

It is an amenable number.

19973461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19973461 is an equidigital number, since it uses as much as digits as its factorization.

19973461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 19973461 is about 4469.1678196282. The cubic root of 19973461 is about 271.3216452991.

The spelling of 19973461 in words is "nineteen million, nine hundred seventy-three thousand, four hundred sixty-one".