342989557 has 2 divisors, whose sum is σ = 342989558. Its totient is φ = 342989556.

The previous prime is 342989527. The next prime is 342989561. The reversal of 342989557 is 755989243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341177841 + 1811716 = 18471^2 + 1346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342989557 is a prime.

It is a super-2 number, since 2×342989557² = 235283672422112498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342989527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171494778 + 171494779.

It is an arithmetic number, because the mean of its divisors is an integer number (171494779).

Almost surely, 2^342989557 is an apocalyptic number.

It is an amenable number.

342989557 is a deficient number, since it is larger than the sum of its proper divisors (1).

342989557 is an equidigital number, since it uses as much as digits as its factorization.

342989557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 52.

The square root of 342989557 is about 18519.9772408067. The cubic root of 342989557 is about 699.9928958463.

The spelling of 342989557 in words is "three hundred forty-two million, nine hundred eighty-nine thousand, five hundred fifty-seven".