89721403 has 2 divisors, whose sum is σ = 89721404. Its totient is φ = 89721402.

The previous prime is 89721397. The next prime is 89721451. The reversal of 89721403 is 30412798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89721403 - 2¹⁷ = 89590331 is a prime.

It is not a weakly prime, because it can be changed into another prime (89721703) 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, 44860701 + 44860702.

It is an arithmetic number, because the mean of its divisors is an integer number (44860702).

Almost surely, 2^89721403 is an apocalyptic number.

89721403 is a deficient number, since it is larger than the sum of its proper divisors (1).

89721403 is an equidigital number, since it uses as much as digits as its factorization.

89721403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 89721403 is about 9472.1382485688. The cubic root of 89721403 is about 447.6775871011.

The spelling of 89721403 in words is "eighty-nine million, seven hundred twenty-one thousand, four hundred three".