80891903 has 2 divisors, whose sum is σ = 80891904. Its totient is φ = 80891902.

The previous prime is 80891869. The next prime is 80891929. The reversal of 80891903 is 30919808.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80891903 - 2¹⁶ = 80826367 is a prime.

It is a super-2 number, since 2×80891903² = 13086999941922818, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80891963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40445951 + 40445952.

It is an arithmetic number, because the mean of its divisors is an integer number (40445952).

Almost surely, 2^80891903 is an apocalyptic number.

80891903 is a deficient number, since it is larger than the sum of its proper divisors (1).

80891903 is an equidigital number, since it uses as much as digits as its factorization.

80891903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 80891903 is about 8993.9926061789. The cubic root of 80891903 is about 432.4823127519.

The spelling of 80891903 in words is "eighty million, eight hundred ninety-one thousand, nine hundred three".