90722709 has 96 divisors (see below), whose sum is σ = 174440448. Its totient is φ = 44064000.

The previous prime is 90722683. The next prime is 90722711.

90722709 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90722709 - 2⁷ = 90722581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90722729) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 880752 + ... + 880854.

It is an arithmetic number, because the mean of its divisors is an integer number (1817088).

Almost surely, 2^90722709 is an apocalyptic number.

90722709 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

90722709 is a deficient number, since it is larger than the sum of its proper divisors (83717739).

90722709 is a wasteful number, since it uses less digits than its factorization.

90722709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 90722709 is about 9524.8469279039. The cubic root of 90722709 is about 449.3368157096.

It can be divided in two parts, 9072 and 2709, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 90722709 in words is "ninety million, seven hundred twenty-two thousand, seven hundred nine".