19427393 has 2 divisors, whose sum is σ = 19427394. Its totient is φ = 19427392.

The previous prime is 19427389. The next prime is 19427423. The reversal of 19427393 is 39372491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13162384 + 6265009 = 3628^2 + 2503^2 .

It is a cyclic number.

It is not a de Polignac number, because 19427393 - 2² = 19427389 is a prime.

It is not a weakly prime, because it can be changed into another prime (19427363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9713696 + 9713697.

It is an arithmetic number, because the mean of its divisors is an integer number (9713697).

Almost surely, 2^19427393 is an apocalyptic number.

It is an amenable number.

19427393 is a deficient number, since it is larger than the sum of its proper divisors (1).

19427393 is an equidigital number, since it uses as much as digits as its factorization.

19427393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 19427393 is about 4407.6516423148. The cubic root of 19427393 is about 268.8261476669.

The spelling of 19427393 in words is "nineteen million, four hundred twenty-seven thousand, three hundred ninety-three".