351994347 has 12 divisors (see below), whose sum is σ = 509486640. Its totient is φ = 234178128.

The previous prime is 351994309. The next prime is 351994381. The reversal of 351994347 is 743499153.

351994347 is a `hidden beast` number, since 3 + 519 + 94 + 3 + 47 = 666.

It is not a de Polignac number, because 351994347 - 2⁷ = 351994219 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (351994397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35772 + ... + 44537.

It is an arithmetic number, because the mean of its divisors is an integer number (42457220).

Almost surely, 2^351994347 is an apocalyptic number.

351994347 is a deficient number, since it is larger than the sum of its proper divisors (157492293).

351994347 is a wasteful number, since it uses less digits than its factorization.

351994347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80802 (or 80799 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 351994347 is about 18761.5123857327. The cubic root of 351994347 is about 706.0658872989.

The spelling of 351994347 in words is "three hundred fifty-one million, nine hundred ninety-four thousand, three hundred forty-seven".