90434999 has 2 divisors, whose sum is σ = 90435000. Its totient is φ = 90434998.

The previous prime is 90434987. The next prime is 90435031. The reversal of 90434999 is 99943409.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99943409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90434999 - 2¹⁶ = 90369463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90434299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45217499 + 45217500.

It is an arithmetic number, because the mean of its divisors is an integer number (45217500).

Almost surely, 2^90434999 is an apocalyptic number.

90434999 is a deficient number, since it is larger than the sum of its proper divisors (1).

90434999 is an equidigital number, since it uses as much as digits as its factorization.

90434999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 90434999 is about 9509.7318048408. The cubic root of 90434999 is about 448.8613169840.

The spelling of 90434999 in words is "ninety million, four hundred thirty-four thousand, nine hundred ninety-nine".