19078949 has 2 divisors, whose sum is σ = 19078950. Its totient is φ = 19078948.

The previous prime is 19078933. The next prime is 19078951. The reversal of 19078949 is 94987091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14876449 + 4202500 = 3857^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 19078949 - 2⁴ = 19078933 is a prime.

Together with 19078951, 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 (19078649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9539474 + 9539475.

It is an arithmetic number, because the mean of its divisors is an integer number (9539475).

Almost surely, 2^19078949 is an apocalyptic number.

It is an amenable number.

19078949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19078949 is an equidigital number, since it uses as much as digits as its factorization.

19078949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 19078949 is about 4367.9456269510. The cubic root of 19078949 is about 267.2092464933.

The spelling of 19078949 in words is "nineteen million, seventy-eight thousand, nine hundred forty-nine".