155660423 has 2 divisors, whose sum is σ = 155660424. Its totient is φ = 155660422.

The previous prime is 155660399. The next prime is 155660431. The reversal of 155660423 is 324066551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155660423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155660423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155660623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77830211 + 77830212.

It is an arithmetic number, because the mean of its divisors is an integer number (77830212).

Almost surely, 2^155660423 is an apocalyptic number.

155660423 is a deficient number, since it is larger than the sum of its proper divisors (1).

155660423 is an equidigital number, since it uses as much as digits as its factorization.

155660423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 155660423 is about 12476.3946314630. The cubic root of 155660423 is about 537.9303759120.

The spelling of 155660423 in words is "one hundred fifty-five million, six hundred sixty thousand, four hundred twenty-three".