1999487365 has 16 divisors (see below), whose sum is σ = 2454423552. Its totient is φ = 1563274944.

The previous prime is 1999487311. The next prime is 1999487411. The reversal of 1999487365 is 5637849991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1999487365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19047 + ... + 66043.

It is an arithmetic number, because the mean of its divisors is an integer number (153401472).

Almost surely, 2^1999487365 is an apocalyptic number.

It is an amenable number.

1999487365 is a deficient number, since it is larger than the sum of its proper divisors (454936187).

1999487365 is a wasteful number, since it uses less digits than its factorization.

1999487365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47196.

The product of its digits is 14696640, while the sum is 61.

The square root of 1999487365 is about 44715.6277491438. The cubic root of 1999487365 is about 1259.8133940918.

The spelling of 1999487365 in words is "one billion, nine hundred ninety-nine million, four hundred eighty-seven thousand, three hundred sixty-five".