7321899973 has 2 divisors, whose sum is σ = 7321899974. Its totient is φ = 7321899972.

The previous prime is 7321899947. The next prime is 7321899979. The reversal of 7321899973 is 3799981237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5851791009 + 1470108964 = 76497^2 + 38342^2 .

It is a cyclic number.

It is not a de Polignac number, because 7321899973 - 2¹³ = 7321891781 is a prime.

It is a super-2 number, since 2×7321899973² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7321899979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3660949986 + 3660949987.

It is an arithmetic number, because the mean of its divisors is an integer number (3660949987).

Almost surely, 2^7321899973 is an apocalyptic number.

It is an amenable number.

7321899973 is a deficient number, since it is larger than the sum of its proper divisors (1).

7321899973 is an equidigital number, since it uses as much as digits as its factorization.

7321899973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 58.

The square root of 7321899973 is about 85568.1013754542. The cubic root of 7321899973 is about 1941.8153529573.

The spelling of 7321899973 in words is "seven billion, three hundred twenty-one million, eight hundred ninety-nine thousand, nine hundred seventy-three".