155595497 has 2 divisors, whose sum is σ = 155595498. Its totient is φ = 155595496.

The previous prime is 155595481. The next prime is 155595499. The reversal of 155595497 is 794595551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113656921 + 41938576 = 10661^2 + 6476^2 .

It is an emirp because it is prime and its reverse (794595551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155595497 - 2⁴ = 155595481 is a prime.

Together with 155595499, 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 (155595499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77797748 + 77797749.

It is an arithmetic number, because the mean of its divisors is an integer number (77797749).

Almost surely, 2^155595497 is an apocalyptic number.

It is an amenable number.

155595497 is a deficient number, since it is larger than the sum of its proper divisors (1).

155595497 is an equidigital number, since it uses as much as digits as its factorization.

155595497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417500, while the sum is 50.

The square root of 155595497 is about 12473.7924064817. The cubic root of 155595497 is about 537.8555752147.

The spelling of 155595497 in words is "one hundred fifty-five million, five hundred ninety-five thousand, four hundred ninety-seven".