1923155291 has 2 divisors, whose sum is σ = 1923155292. Its totient is φ = 1923155290.

The previous prime is 1923155279. The next prime is 1923155293. The reversal of 1923155291 is 1925513291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1923155291 - 2²² = 1918960987 is a prime.

Together with 1923155293, 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 (1923155293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961577645 + 961577646.

It is an arithmetic number, because the mean of its divisors is an integer number (961577646).

Almost surely, 2^1923155291 is an apocalyptic number.

1923155291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923155291 is an equidigital number, since it uses as much as digits as its factorization.

1923155291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 38.

The square root of 1923155291 is about 43853.7944880486. The cubic root of 1923155291 is about 1243.5734785599.

The spelling of 1923155291 in words is "one billion, nine hundred twenty-three million, one hundred fifty-five thousand, two hundred ninety-one".