19972567 has 2 divisors, whose sum is σ = 19972568. Its totient is φ = 19972566.

The previous prime is 19972541. The next prime is 19972613. The reversal of 19972567 is 76527991.

It is a happy number.

It is an a-pointer prime, because the next prime (19972613) can be obtained adding 19972567 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19972567 - 2¹⁹ = 19448279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19972067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986283 + 9986284.

It is an arithmetic number, because the mean of its divisors is an integer number (9986284).

Almost surely, 2^19972567 is an apocalyptic number.

19972567 is a deficient number, since it is larger than the sum of its proper divisors (1).

19972567 is an equidigital number, since it uses as much as digits as its factorization.

19972567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 46.

The square root of 19972567 is about 4469.0677998885. The cubic root of 19972567 is about 271.3175971746.

The spelling of 19972567 in words is "nineteen million, nine hundred seventy-two thousand, five hundred sixty-seven".