690773345 has 8 divisors (see below), whose sum is σ = 831278376. Its totient is φ = 551051776.

The previous prime is 690773273. The next prime is 690773353. The reversal of 690773345 is 543377096.

690773345 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 194909521 + 495863824 = 13961^2 + 22268^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 690773345 - 2²⁸ = 422337889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690773296 and 690773305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193922 + ... + 197451.

It is an arithmetic number, because the mean of its divisors is an integer number (103909797).

Almost surely, 2^690773345 is an apocalyptic number.

It is an amenable number.

690773345 is a deficient number, since it is larger than the sum of its proper divisors (140505031).

690773345 is a wasteful number, since it uses less digits than its factorization.

690773345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391731.

The product of its (nonzero) digits is 476280, while the sum is 44.

The square root of 690773345 is about 26282.5673213254. The cubic root of 690773345 is about 883.9855997224.

The spelling of 690773345 in words is "six hundred ninety million, seven hundred seventy-three thousand, three hundred forty-five".