90690598769 has 8 divisors (see below), whose sum is σ = 92406470760. Its totient is φ = 88974902016.

The previous prime is 90690598759. The next prime is 90690598793. The reversal of 90690598769 is 96789509609.

It can be written as a sum of positive squares in 4 ways, for example, as 73137793600 + 17552805169 = 270440^2 + 132487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90690598769 is a prime.

It is a super-2 number, since 2×90690598769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90690598699 and 90690598708.

It is not an unprimeable number, because it can be changed into a prime (90690598709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531097 + ... + 1589225.

It is an arithmetic number, because the mean of its divisors is an integer number (11550808845).

Almost surely, 2^90690598769 is an apocalyptic number.

It is an amenable number.

90690598769 is a deficient number, since it is larger than the sum of its proper divisors (1715871991).

90690598769 is a wasteful number, since it uses less digits than its factorization.

90690598769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87619.

The product of its (nonzero) digits is 66134880, while the sum is 68.

The spelling of 90690598769 in words is "ninety billion, six hundred ninety million, five hundred ninety-eight thousand, seven hundred sixty-nine".