690282793138 has 4 divisors (see below), whose sum is σ = 1035424189710. Its totient is φ = 345141396568.

The previous prime is 690282793121. The next prime is 690282793139. The reversal of 690282793138 is 831397282096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 672191736129 + 18091057009 = 819873^2 + 134503^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (690282793139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172570698283 + ... + 172570698286.

Almost surely, 2^690282793138 is an apocalyptic number.

690282793138 is a deficient number, since it is larger than the sum of its proper divisors (345141396572).

690282793138 is a wasteful number, since it uses less digits than its factorization.

690282793138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345141396571.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 690282793138 in words is "six hundred ninety billion, two hundred eighty-two million, seven hundred ninety-three thousand, one hundred thirty-eight".