19479487 has 2 divisors, whose sum is σ = 19479488. Its totient is φ = 19479486.

The previous prime is 19479451. The next prime is 19479497. The reversal of 19479487 is 78497491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19479487 - 2⁷ = 19479359 is a prime.

It is a plaindrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 19479487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19479437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9739743 + 9739744.

It is an arithmetic number, because the mean of its divisors is an integer number (9739744).

Almost surely, 2^19479487 is an apocalyptic number.

19479487 is a deficient number, since it is larger than the sum of its proper divisors (1).

19479487 is an equidigital number, since it uses as much as digits as its factorization.

19479487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 19479487 is about 4413.5571821378. The cubic root of 19479487 is about 269.0662164302.

The spelling of 19479487 in words is "nineteen million, four hundred seventy-nine thousand, four hundred eighty-seven".