19791461 has 2 divisors, whose sum is σ = 19791462. Its totient is φ = 19791460.

The previous prime is 19791439. The next prime is 19791467. The reversal of 19791461 is 16419791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 9647236 = 3185^2 + 3106^2 .

It is an emirp because it is prime and its reverse (16419791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19791461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19791467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9895730 + 9895731.

It is an arithmetic number, because the mean of its divisors is an integer number (9895731).

Almost surely, 2^19791461 is an apocalyptic number.

It is an amenable number.

19791461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19791461 is an equidigital number, since it uses as much as digits as its factorization.

19791461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 19791461 is about 4448.7594900152. The cubic root of 19791461 is about 270.4950269175.

The spelling of 19791461 in words is "nineteen million, seven hundred ninety-one thousand, four hundred sixty-one".