1699344538 has 4 divisors (see below), whose sum is σ = 2549016810. Its totient is φ = 849672268.

The previous prime is 1699344529. The next prime is 1699344583. The reversal of 1699344538 is 8354439961.

It is a happy number.

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., 1649740689 + 49603849 = 40617^2 + 7043^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424836133 + ... + 424836136.

Almost surely, 2^1699344538 is an apocalyptic number.

1699344538 is a deficient number, since it is larger than the sum of its proper divisors (849672272).

1699344538 is an equidigital number, since it uses as much as digits as its factorization.

1699344538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849672271.

The product of its digits is 2799360, while the sum is 52.

The square root of 1699344538 is about 41223.1068455545. The cubic root of 1699344538 is about 1193.3297834093.

The spelling of 1699344538 in words is "one billion, six hundred ninety-nine million, three hundred forty-four thousand, five hundred thirty-eight".