19399069 has 2 divisors, whose sum is σ = 19399070. Its totient is φ = 19399068.

The previous prime is 19399067. The next prime is 19399073. The reversal of 19399069 is 96099391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 7634169 = 3430^2 + 2763^2 .

It is a cyclic number.

It is not a de Polignac number, because 19399069 - 2¹ = 19399067 is a prime.

It is a super-2 number, since 2×19399069² = 752647756133522, which contains 22 as substring.

Together with 19399067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19399067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9699534 + 9699535.

It is an arithmetic number, because the mean of its divisors is an integer number (9699535).

Almost surely, 2^19399069 is an apocalyptic number.

It is an amenable number.

19399069 is a deficient number, since it is larger than the sum of its proper divisors (1).

19399069 is an equidigital number, since it uses as much as digits as its factorization.

19399069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 19399069 is about 4404.4374215103. The cubic root of 19399069 is about 268.6954398707.

The spelling of 19399069 in words is "nineteen million, three hundred ninety-nine thousand, sixty-nine".