347779997 has 4 divisors (see below), whose sum is σ = 349790460. Its totient is φ = 345769536.

The previous prime is 347779981. The next prime is 347780003. The reversal of 347779997 is 799977743.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214007641 + 133772356 = 14629^2 + 11566^2 .

It is a cyclic number.

It is not a de Polignac number, because 347779997 - 2⁴ = 347779981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347779937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004972 + ... + 1005317.

It is an arithmetic number, because the mean of its divisors is an integer number (87447615).

Almost surely, 2^347779997 is an apocalyptic number.

It is an amenable number.

347779997 is a deficient number, since it is larger than the sum of its proper divisors (2010463).

347779997 is a wasteful number, since it uses less digits than its factorization.

347779997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010462.

The product of its digits is 21003948, while the sum is 62.

The square root of 347779997 is about 18648.8604745706. The cubic root of 347779997 is about 703.2367094465.

The spelling of 347779997 in words is "three hundred forty-seven million, seven hundred seventy-nine thousand, nine hundred ninety-seven".