342991669 has 2 divisors, whose sum is σ = 342991670. Its totient is φ = 342991668.

The previous prime is 342991651. The next prime is 342991681. The reversal of 342991669 is 966199243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340845444 + 2146225 = 18462^2 + 1465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342991669 is a prime.

It is a super-2 number, since 2×342991669² = 235286570006811122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342991639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171495834 + 171495835.

It is an arithmetic number, because the mean of its divisors is an integer number (171495835).

Almost surely, 2^342991669 is an apocalyptic number.

It is an amenable number.

342991669 is a deficient number, since it is larger than the sum of its proper divisors (1).

342991669 is an equidigital number, since it uses as much as digits as its factorization.

342991669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 49.

The square root of 342991669 is about 18520.0342602275. The cubic root of 342991669 is about 699.9943326072.

The spelling of 342991669 in words is "three hundred forty-two million, nine hundred ninety-one thousand, six hundred sixty-nine".