239628491 has 2 divisors, whose sum is σ = 239628492. Its totient is φ = 239628490.

The previous prime is 239628461. The next prime is 239628503. The reversal of 239628491 is 194826932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239628491 - 2⁶ = 239628427 is a prime.

It is not a weakly prime, because it can be changed into another prime (239628401) 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, 119814245 + 119814246.

It is an arithmetic number, because the mean of its divisors is an integer number (119814246).

Almost surely, 2^239628491 is an apocalyptic number.

239628491 is a deficient number, since it is larger than the sum of its proper divisors (1).

239628491 is an equidigital number, since it uses as much as digits as its factorization.

239628491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 239628491 is about 15479.9383396705. The cubic root of 239628491 is about 621.1256786940.

The spelling of 239628491 in words is "two hundred thirty-nine million, six hundred twenty-eight thousand, four hundred ninety-one".