19054661 has 2 divisors, whose sum is σ = 19054662. Its totient is φ = 19054660.

The previous prime is 19054621. The next prime is 19054687. The reversal of 19054661 is 16645091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 616225 = 4294^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 19054661 - 2⁶ = 19054597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19054621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9527330 + 9527331.

It is an arithmetic number, because the mean of its divisors is an integer number (9527331).

Almost surely, 2^19054661 is an apocalyptic number.

It is an amenable number.

19054661 is a deficient number, since it is larger than the sum of its proper divisors (1).

19054661 is an equidigital number, since it uses as much as digits as its factorization.

19054661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 19054661 is about 4365.1644871643. The cubic root of 19054661 is about 267.0958102291.

The spelling of 19054661 in words is "nineteen million, fifty-four thousand, six hundred sixty-one".