1620003693 has 64 divisors (see below), whose sum is σ = 2742018048. Its totient is φ = 826398720.

The previous prime is 1620003691. The next prime is 1620003703. The reversal of 1620003693 is 3963000261.

It is a happy number.

1620003693 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1620003693 - 2¹ = 1620003691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1620003693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620003691) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4413996 + ... + 4414362.

It is an arithmetic number, because the mean of its divisors is an integer number (42844032).

Almost surely, 2^1620003693 is an apocalyptic number.

It is an amenable number.

1620003693 is a deficient number, since it is larger than the sum of its proper divisors (1122014355).

1620003693 is a wasteful number, since it uses less digits than its factorization.

1620003693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 1620003693 is about 40249.2694716314. The cubic root of 1620003693 is about 1174.4611847948.

The spelling of 1620003693 in words is "one billion, six hundred twenty million, three thousand, six hundred ninety-three".