1699147445 has 4 divisors (see below), whose sum is σ = 2038976940. Its totient is φ = 1359317952.

The previous prime is 1699147427. The next prime is 1699147459. The reversal of 1699147445 is 5447419961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5447419961 = 293 ⋅18591877.

It can be written as a sum of positive squares in 2 ways, for example, as 700713841 + 998433604 = 26471^2 + 31598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1699147445 - 2¹⁸ = 1698885301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1699147393 and 1699147402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169914740 + ... + 169914749.

It is an arithmetic number, because the mean of its divisors is an integer number (509744235).

Almost surely, 2^1699147445 is an apocalyptic number.

It is an amenable number.

1699147445 is a deficient number, since it is larger than the sum of its proper divisors (339829495).

1699147445 is an equidigital number, since it uses as much as digits as its factorization.

1699147445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339829494.

The product of its digits is 1088640, while the sum is 50.

The square root of 1699147445 is about 41220.7162116332. The cubic root of 1699147445 is about 1193.2836467891.

The spelling of 1699147445 in words is "one billion, six hundred ninety-nine million, one hundred forty-seven thousand, four hundred forty-five".