19401047 has 2 divisors, whose sum is σ = 19401048. Its totient is φ = 19401046.

The previous prime is 19401043. The next prime is 19401049. The reversal of 19401047 is 74010491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19401047 - 2² = 19401043 is a prime.

Together with 19401049, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19401043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9700523 + 9700524.

It is an arithmetic number, because the mean of its divisors is an integer number (9700524).

Almost surely, 2^19401047 is an apocalyptic number.

19401047 is a deficient number, since it is larger than the sum of its proper divisors (1).

19401047 is an equidigital number, since it uses as much as digits as its factorization.

19401047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 19401047 is about 4404.6619620579. The cubic root of 19401047 is about 268.7045719501.

The spelling of 19401047 in words is "nineteen million, four hundred one thousand, forty-seven".