90723859 has 2 divisors, whose sum is σ = 90723860. Its totient is φ = 90723858.

The previous prime is 90723833. The next prime is 90723869. The reversal of 90723859 is 95832709.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90723859 is a prime.

It is not a weakly prime, because it can be changed into another prime (90723869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45361929 + 45361930.

It is an arithmetic number, because the mean of its divisors is an integer number (45361930).

Almost surely, 2^90723859 is an apocalyptic number.

90723859 is a deficient number, since it is larger than the sum of its proper divisors (1).

90723859 is an equidigital number, since it uses as much as digits as its factorization.

90723859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 90723859 is about 9524.9072961368. The cubic root of 90723859 is about 449.3387142977.

The spelling of 90723859 in words is "ninety million, seven hundred twenty-three thousand, eight hundred fifty-nine".