19130257 has 2 divisors, whose sum is σ = 19130258. Its totient is φ = 19130256.

The previous prime is 19130249. The next prime is 19130261. The reversal of 19130257 is 75203191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13220496 + 5909761 = 3636^2 + 2431^2 .

It is a cyclic number.

It is not a de Polignac number, because 19130257 - 2³ = 19130249 is a prime.

It is not a weakly prime, because it can be changed into another prime (19130057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9565128 + 9565129.

It is an arithmetic number, because the mean of its divisors is an integer number (9565129).

Almost surely, 2^19130257 is an apocalyptic number.

It is an amenable number.

19130257 is a deficient number, since it is larger than the sum of its proper divisors (1).

19130257 is an equidigital number, since it uses as much as digits as its factorization.

19130257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 19130257 is about 4373.8149252112. The cubic root of 19130257 is about 267.4485626197.

The spelling of 19130257 in words is "nineteen million, one hundred thirty thousand, two hundred fifty-seven".