19054993 has 2 divisors, whose sum is σ = 19054994. Its totient is φ = 19054992.

The previous prime is 19054979. The next prime is 19054999. The reversal of 19054993 is 39945091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17497489 + 1557504 = 4183^2 + 1248^2 .

It is an emirp because it is prime and its reverse (39945091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19054993 - 2⁵ = 19054961 is a prime.

It is not a weakly prime, because it can be changed into another prime (19054999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9527496 + 9527497.

It is an arithmetic number, because the mean of its divisors is an integer number (9527497).

Almost surely, 2^19054993 is an apocalyptic number.

It is an amenable number.

19054993 is a deficient number, since it is larger than the sum of its proper divisors (1).

19054993 is an equidigital number, since it uses as much as digits as its factorization.

19054993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 19054993 is about 4365.2025153479. The cubic root of 19054993 is about 267.0973614732.

The spelling of 19054993 in words is "nineteen million, fifty-four thousand, nine hundred ninety-three".