155925493 has 2 divisors, whose sum is σ = 155925494. Its totient is φ = 155925492.

The previous prime is 155925449. The next prime is 155925499. The reversal of 155925493 is 394529551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155925169 + 324 = 12487^2 + 18^2 .

It is a cyclic number.

It is not a de Polignac number, because 155925493 - 2²¹ = 153828341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155925499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77962746 + 77962747.

It is an arithmetic number, because the mean of its divisors is an integer number (77962747).

Almost surely, 2^155925493 is an apocalyptic number.

It is an amenable number.

155925493 is a deficient number, since it is larger than the sum of its proper divisors (1).

155925493 is an equidigital number, since it uses as much as digits as its factorization.

155925493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243000, while the sum is 43.

The square root of 155925493 is about 12487.0129734857. The cubic root of 155925493 is about 538.2355452059.

The spelling of 155925493 in words is "one hundred fifty-five million, nine hundred twenty-five thousand, four hundred ninety-three".