347866993 has 2 divisors, whose sum is σ = 347866994. Its totient is φ = 347866992.

The previous prime is 347866979. The next prime is 347867053. The reversal of 347866993 is 399668743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326633329 + 21233664 = 18073^2 + 4608^2 .

It is a cyclic number.

It is not a de Polignac number, because 347866993 - 2²¹ = 345769841 is a prime.

It is a super-2 number, since 2×347866993² = 242022889637724098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (347866943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173933496 + 173933497.

It is an arithmetic number, because the mean of its divisors is an integer number (173933497).

Almost surely, 2^347866993 is an apocalyptic number.

It is an amenable number.

347866993 is a deficient number, since it is larger than the sum of its proper divisors (1).

347866993 is an equidigital number, since it uses as much as digits as its factorization.

347866993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 55.

The square root of 347866993 is about 18651.1928036788. The cubic root of 347866993 is about 703.2953419928.

The spelling of 347866993 in words is "three hundred forty-seven million, eight hundred sixty-six thousand, nine hundred ninety-three".