690131238705 has 48 divisors (see below), whose sum is σ = 1213027981776. Its totient is φ = 362904053760.

The previous prime is 690131238679. The next prime is 690131238721. The reversal of 690131238705 is 507832131096.

It can be written as a sum of positive squares in 8 ways, for example, as 93597447969 + 596533790736 = 305937^2 + 772356^2 .

It is not a de Polignac number, because 690131238705 - 2⁸ = 690131238449 is a prime.

It is a super-3 number, since 3×690131238705³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10021069 + ... + 10089701.

It is an arithmetic number, because the mean of its divisors is an integer number (25271416287).

Almost surely, 2^690131238705 is an apocalyptic number.

It is an amenable number.

690131238705 is a deficient number, since it is larger than the sum of its proper divisors (522896743071).

690131238705 is a wasteful number, since it uses less digits than its factorization.

690131238705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71778 (or 71775 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 690131238705 in words is "six hundred ninety billion, one hundred thirty-one million, two hundred thirty-eight thousand, seven hundred five".