642998341 has 2 divisors, whose sum is σ = 642998342. Its totient is φ = 642998340.

The previous prime is 642998329. The next prime is 642998351. The reversal of 642998341 is 143899246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389233441 + 253764900 = 19729^2 + 15930^2 .

It is a cyclic number.

It is not a de Polignac number, because 642998341 - 2⁵ = 642998309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642998291 and 642998300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642998351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321499170 + 321499171.

It is an arithmetic number, because the mean of its divisors is an integer number (321499171).

Almost surely, 2^642998341 is an apocalyptic number.

It is an amenable number.

642998341 is a deficient number, since it is larger than the sum of its proper divisors (1).

642998341 is an equidigital number, since it uses as much as digits as its factorization.

642998341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 642998341 is about 25357.4119539041. The cubic root of 642998341 is about 863.1175569066.

The spelling of 642998341 in words is "six hundred forty-two million, nine hundred ninety-eight thousand, three hundred forty-one".