155690453 has 2 divisors, whose sum is σ = 155690454. Its totient is φ = 155690452.

The previous prime is 155690419. The next prime is 155690467. The reversal of 155690453 is 354096551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121374289 + 34316164 = 11017^2 + 5858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155690453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155690053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77845226 + 77845227.

It is an arithmetic number, because the mean of its divisors is an integer number (77845227).

Almost surely, 2^155690453 is an apocalyptic number.

It is an amenable number.

155690453 is a deficient number, since it is larger than the sum of its proper divisors (1).

155690453 is an equidigital number, since it uses as much as digits as its factorization.

155690453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 155690453 is about 12477.5980460985. The cubic root of 155690453 is about 537.9649661870.

The spelling of 155690453 in words is "one hundred fifty-five million, six hundred ninety thousand, four hundred fifty-three".