1613993474 has 4 divisors (see below), whose sum is σ = 2420990214. Its totient is φ = 806996736.

The previous prime is 1613993473. The next prime is 1613993483. The reversal of 1613993474 is 4743993161.

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., 1486642249 + 127351225 = 38557^2 + 11285^2 .

It is a super-2 number, since 2×1613993474² = 5209949868229177352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1613993473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403498367 + ... + 403498370.

Almost surely, 2^1613993474 is an apocalyptic number.

1613993474 is a deficient number, since it is larger than the sum of its proper divisors (806996740).

1613993474 is an equidigital number, since it uses as much as digits as its factorization.

1613993474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806996739.

The product of its digits is 489888, while the sum is 47.

The square root of 1613993474 is about 40174.5376326847. The cubic root of 1613993474 is about 1173.0069666456.

The spelling of 1613993474 in words is "one billion, six hundred thirteen million, nine hundred ninety-three thousand, four hundred seventy-four".