699138242 has 12 divisors (see below), whose sum is σ = 1152711798. Its totient is φ = 317790000.

The previous prime is 699138241. The next prime is 699138283. The reversal of 699138242 is 242831996.

It can be written as a sum of positive squares in only one way, i.e., 696379321 + 2758921 = 26389^2 + 1661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 699138193 and 699138202.

It is not an unprimeable number, because it can be changed into a prime (699138241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1444259 + ... + 1444742.

Almost surely, 2^699138242 is an apocalyptic number.

699138242 is a deficient number, since it is larger than the sum of its proper divisors (453573556).

699138242 is a wasteful number, since it uses less digits than its factorization.

699138242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889025 (or 2889014 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 699138242 is about 26441.2223998816. Note that the first 3 decimals coincide. The cubic root of 699138242 is about 887.5394909889.

The spelling of 699138242 in words is "six hundred ninety-nine million, one hundred thirty-eight thousand, two hundred forty-two".