90009739 has 2 divisors, whose sum is σ = 90009740. Its totient is φ = 90009738.

The previous prime is 90009727. The next prime is 90009757. The reversal of 90009739 is 93790009.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90009739 - 2¹¹ = 90007691 is a prime.

It is a super-2 number, since 2×90009739² = 16203506229696242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90009698 and 90009707.

It is not a weakly prime, because it can be changed into another prime (90009769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45004869 + 45004870.

It is an arithmetic number, because the mean of its divisors is an integer number (45004870).

Almost surely, 2^90009739 is an apocalyptic number.

90009739 is a deficient number, since it is larger than the sum of its proper divisors (1).

90009739 is an equidigital number, since it uses as much as digits as its factorization.

90009739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 90009739 is about 9487.3462569888. The cubic root of 90009739 is about 448.1566386656.

The spelling of 90009739 in words is "ninety million, nine thousand, seven hundred thirty-nine".