91869403 has 2 divisors, whose sum is σ = 91869404. Its totient is φ = 91869402.

The previous prime is 91869391. The next prime is 91869413. The reversal of 91869403 is 30496819.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91869403 is a prime.

It is not a weakly prime, because it can be changed into another prime (91869413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45934701 + 45934702.

It is an arithmetic number, because the mean of its divisors is an integer number (45934702).

Almost surely, 2^91869403 is an apocalyptic number.

91869403 is a deficient number, since it is larger than the sum of its proper divisors (1).

91869403 is an equidigital number, since it uses as much as digits as its factorization.

91869403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 91869403 is about 9584.8527896885. The cubic root of 91869403 is about 451.2220331396. Note that the first 3 decimals are identical.

The spelling of 91869403 in words is "ninety-one million, eight hundred sixty-nine thousand, four hundred three".