155491423 has 2 divisors, whose sum is σ = 155491424. Its totient is φ = 155491422.

The previous prime is 155491411. The next prime is 155491429. The reversal of 155491423 is 324194551.

155491423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155491423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155491429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77745711 + 77745712.

It is an arithmetic number, because the mean of its divisors is an integer number (77745712).

Almost surely, 2^155491423 is an apocalyptic number.

155491423 is a deficient number, since it is larger than the sum of its proper divisors (1).

155491423 is an equidigital number, since it uses as much as digits as its factorization.

155491423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 155491423 is about 12469.6200022294. The cubic root of 155491423 is about 537.7356290137.

The spelling of 155491423 in words is "one hundred fifty-five million, four hundred ninety-one thousand, four hundred twenty-three".