155968403 has 2 divisors, whose sum is σ = 155968404. Its totient is φ = 155968402.

The previous prime is 155968391. The next prime is 155968441. The reversal of 155968403 is 304869551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155968403 - 2¹⁸ = 155706259 is a prime.

It is a super-2 number, since 2×155968403² = 48652285468740818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155968493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77984201 + 77984202.

It is an arithmetic number, because the mean of its divisors is an integer number (77984202).

Almost surely, 2^155968403 is an apocalyptic number.

155968403 is a deficient number, since it is larger than the sum of its proper divisors (1).

155968403 is an equidigital number, since it uses as much as digits as its factorization.

155968403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 155968403 is about 12488.7310404220. The cubic root of 155968403 is about 538.2849140177.

The spelling of 155968403 in words is "one hundred fifty-five million, nine hundred sixty-eight thousand, four hundred three".