321499747 has 2 divisors, whose sum is σ = 321499748. Its totient is φ = 321499746.

The previous prime is 321499679. The next prime is 321499757. The reversal of 321499747 is 747994123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321499747 - 2¹⁵ = 321466979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321499697 and 321499706.

It is not a weakly prime, because it can be changed into another prime (321499757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160749873 + 160749874.

It is an arithmetic number, because the mean of its divisors is an integer number (160749874).

Almost surely, 2^321499747 is an apocalyptic number.

321499747 is a deficient number, since it is larger than the sum of its proper divisors (1).

321499747 is an equidigital number, since it uses as much as digits as its factorization.

321499747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 321499747 is about 17930.4140219907. The cubic root of 321499747 is about 685.0572683752.

The spelling of 321499747 in words is "three hundred twenty-one million, four hundred ninety-nine thousand, seven hundred forty-seven".