19692401 has 2 divisors, whose sum is σ = 19692402. Its totient is φ = 19692400.

The previous prime is 19692383. The next prime is 19692403. The reversal of 19692401 is 10429691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18054001 + 1638400 = 4249^2 + 1280^2 .

It is an emirp because it is prime and its reverse (10429691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19692401 is a prime.

Together with 19692403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19692403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9846200 + 9846201.

It is an arithmetic number, because the mean of its divisors is an integer number (9846201).

Almost surely, 2^19692401 is an apocalyptic number.

It is an amenable number.

19692401 is a deficient number, since it is larger than the sum of its proper divisors (1).

19692401 is an equidigital number, since it uses as much as digits as its factorization.

19692401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19692401 is about 4437.6120830915. The cubic root of 19692401 is about 270.0429789835.

The spelling of 19692401 in words is "nineteen million, six hundred ninety-two thousand, four hundred one".