19135397 has 4 divisors (see below), whose sum is σ = 19602156. Its totient is φ = 18668640.

The previous prime is 19135393. The next prime is 19135399. The reversal of 19135397 is 79353191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 481636 + 18653761 = 694^2 + 4319^2 .

It is a cyclic number.

It is not a de Polignac number, because 19135397 - 2² = 19135393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19135397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19135393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233318 + ... + 233399.

It is an arithmetic number, because the mean of its divisors is an integer number (4900539).

Almost surely, 2^19135397 is an apocalyptic number.

It is an amenable number.

19135397 is a deficient number, since it is larger than the sum of its proper divisors (466759).

19135397 is an equidigital number, since it uses as much as digits as its factorization.

19135397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466758.

The product of its digits is 25515, while the sum is 38.

The square root of 19135397 is about 4374.4024734814. The cubic root of 19135397 is about 267.4725135528.

The spelling of 19135397 in words is "nineteen million, one hundred thirty-five thousand, three hundred ninety-seven".