1613993406 has 16 divisors (see below), whose sum is σ = 3236419584. Its totient is φ = 536592344.

The previous prime is 1613993401. The next prime is 1613993443. The reversal of 1613993406 is 6043993161.

1613993406 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1613993406² = 5209949429222961672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613993401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348876 + ... + 353471.

It is an arithmetic number, because the mean of its divisors is an integer number (202276224).

Almost surely, 2^1613993406 is an apocalyptic number.

1613993406 is an abundant number, since it is smaller than the sum of its proper divisors (1622426178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1613993406 is a wasteful number, since it uses less digits than its factorization.

1613993406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702735.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 1613993406 is about 40174.5367863775. The cubic root of 1613993406 is about 1173.0069501721.

The spelling of 1613993406 in words is "one billion, six hundred thirteen million, nine hundred ninety-three thousand, four hundred six".