19399077 has 12 divisors (see below), whose sum is σ = 28201420. Its totient is φ = 12849408.

The previous prime is 19399073. The next prime is 19399099. The reversal of 19399077 is 77099391.

It can be written as a sum of positive squares in 2 ways, for example, as 6395841 + 13003236 = 2529^2 + 3606^2 .

It is not a de Polignac number, because 19399077 - 2² = 19399073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19399073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5452 + ... + 8277.

Almost surely, 2^19399077 is an apocalyptic number.

It is an amenable number.

19399077 is a deficient number, since it is larger than the sum of its proper divisors (8802343).

19399077 is a wasteful number, since it uses less digits than its factorization.

19399077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13892 (or 13889 counting only the distinct ones).

The product of its (nonzero) digits is 107163, while the sum is 45.

The square root of 19399077 is about 4404.4383296852. The cubic root of 19399077 is about 268.6954768066.

The spelling of 19399077 in words is "nineteen million, three hundred ninety-nine thousand, seventy-seven".