155420597 has 2 divisors, whose sum is σ = 155420598. Its totient is φ = 155420596.

The previous prime is 155420581. The next prime is 155420621. The reversal of 155420597 is 795024551.

It is a happy number.

155420597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109641841 + 45778756 = 10471^2 + 6766^2 .

It is an emirp because it is prime and its reverse (795024551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155420597 - 2⁴ = 155420581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155420597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155420527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77710298 + 77710299.

It is an arithmetic number, because the mean of its divisors is an integer number (77710299).

Almost surely, 2^155420597 is an apocalyptic number.

It is an amenable number.

155420597 is a deficient number, since it is larger than the sum of its proper divisors (1).

155420597 is an equidigital number, since it uses as much as digits as its factorization.

155420597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 155420597 is about 12466.7797365639. The cubic root of 155420597 is about 537.6539708167.

The spelling of 155420597 in words is "one hundred fifty-five million, four hundred twenty thousand, five hundred ninety-seven".