690709090247 has 32 divisors (see below), whose sum is σ = 807021792000. Its totient is φ = 584482314240.

The previous prime is 690709090243. The next prime is 690709090261. The reversal of 690709090247 is 742090907096.

It is a happy number.

690709090247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690709090247 - 2² = 690709090243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690709090241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25499303 + ... + 25526375.

It is an arithmetic number, because the mean of its divisors is an integer number (25219431000).

Almost surely, 2^690709090247 is an apocalyptic number.

690709090247 is a deficient number, since it is larger than the sum of its proper divisors (116312701753).

690709090247 is a wasteful number, since it uses less digits than its factorization.

690709090247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29231.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 690709090247 in words is "six hundred ninety billion, seven hundred nine million, ninety thousand, two hundred forty-seven".