1499764921 has 2 divisors, whose sum is σ = 1499764922. Its totient is φ = 1499764920.

The previous prime is 1499764907. The next prime is 1499764967. The reversal of 1499764921 is 1294679941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856381696 + 643383225 = 29264^2 + 25365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1499764921 - 2²⁵ = 1466210489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1499764991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749882460 + 749882461.

It is an arithmetic number, because the mean of its divisors is an integer number (749882461).

Almost surely, 2^1499764921 is an apocalyptic number.

It is an amenable number.

1499764921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1499764921 is an equidigital number, since it uses as much as digits as its factorization.

1499764921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 1499764921 is about 38726.7984863195. The cubic root of 1499764921 is about 1144.6544398115.

The spelling of 1499764921 in words is "one billion, four hundred ninety-nine million, seven hundred sixty-four thousand, nine hundred twenty-one".