90830729 has 4 divisors (see below), whose sum is σ = 99088080. Its totient is φ = 82573380.

The previous prime is 90830723. The next prime is 90830737. The reversal of 90830729 is 92703809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90830729 - 2²⁰ = 89782153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90830692 and 90830701.

It is not an unprimeable number, because it can be changed into a prime (90830723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4128659 + ... + 4128680.

It is an arithmetic number, because the mean of its divisors is an integer number (24772020).

Almost surely, 2^90830729 is an apocalyptic number.

It is an amenable number.

90830729 is a deficient number, since it is larger than the sum of its proper divisors (8257351).

90830729 is a wasteful number, since it uses less digits than its factorization.

90830729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257350.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 90830729 is about 9530.5156733516. The cubic root of 90830729 is about 449.5150809321.

Subtracting 90830729 from its reverse (92703809), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 90830729 in words is "ninety million, eight hundred thirty thousand, seven hundred twenty-nine".