1620999002 has 8 divisors (see below), whose sum is σ = 2778855456. Its totient is φ = 694713852.

The previous prime is 1620998987. The next prime is 1620999013. The reversal of 1620999002 is 2009990261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57892808 + ... + 57892835.

It is an arithmetic number, because the mean of its divisors is an integer number (347356932).

Almost surely, 2^1620999002 is an apocalyptic number.

1620999002 is a deficient number, since it is larger than the sum of its proper divisors (1157856454).

1620999002 is a wasteful number, since it uses less digits than its factorization.

1620999002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115785652.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1620999002 is about 40261.6318844629. The cubic root of 1620999002 is about 1174.7016600641.

The spelling of 1620999002 in words is "one billion, six hundred twenty million, nine hundred ninety-nine thousand, two".