690878223 has 24 divisors (see below), whose sum is σ = 1179828000. Its totient is φ = 381173184.

The previous prime is 690878219. The next prime is 690878231. The reversal of 690878223 is 322878096.

It is not a de Polignac number, because 690878223 - 2² = 690878219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690878203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187248 + ... + 190901.

It is an arithmetic number, because the mean of its divisors is an integer number (49159500).

Almost surely, 2^690878223 is an apocalyptic number.

690878223 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

690878223 is a deficient number, since it is larger than the sum of its proper divisors (488949777).

690878223 is a wasteful number, since it uses less digits than its factorization.

690878223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378191 (or 378188 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 690878223 is about 26284.5624464247. The cubic root of 690878223 is about 884.0303350667.

The spelling of 690878223 in words is "six hundred ninety million, eight hundred seventy-eight thousand, two hundred twenty-three".