1621163299 has 16 divisors (see below), whose sum is σ = 1962899136. Its totient is φ = 1307059200.

The previous prime is 1621163293. The next prime is 1621163363. The reversal of 1621163299 is 9923611261.

It is a cyclic number.

It is not a de Polignac number, because 1621163299 - 2⁹ = 1621162787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621163293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287689 + ... + 293269.

It is an arithmetic number, because the mean of its divisors is an integer number (122681196).

Almost surely, 2^1621163299 is an apocalyptic number.

1621163299 is a deficient number, since it is larger than the sum of its proper divisors (341735837).

1621163299 is a wasteful number, since it uses less digits than its factorization.

1621163299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8046.

The product of its digits is 34992, while the sum is 40.

The square root of 1621163299 is about 40263.6721996392. The cubic root of 1621163299 is about 1174.7413461750.

The spelling of 1621163299 in words is "one billion, six hundred twenty-one million, one hundred sixty-three thousand, two hundred ninety-nine".