89894729 has 2 divisors, whose sum is σ = 89894730. Its totient is φ = 89894728.

The previous prime is 89894669. The next prime is 89894737. The reversal of 89894729 is 92749898.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59644729 + 30250000 = 7723^2 + 5500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89894729 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (89834729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44947364 + 44947365.

It is an arithmetic number, because the mean of its divisors is an integer number (44947365).

Almost surely, 2^89894729 is an apocalyptic number.

It is an amenable number.

89894729 is a deficient number, since it is larger than the sum of its proper divisors (1).

89894729 is an equidigital number, since it uses as much as digits as its factorization.

89894729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The square root of 89894729 is about 9481.2830882745. The cubic root of 89894729 is about 447.9656798353.

The spelling of 89894729 in words is "eighty-nine million, eight hundred ninety-four thousand, seven hundred twenty-nine".