347998861 has 4 divisors (see below), whose sum is σ = 397712992. Its totient is φ = 298284732.

The previous prime is 347998843. The next prime is 347998867. The reversal of 347998861 is 168899743.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 347998861 - 2⁵ = 347998829 is a prime.

It is a super-2 number, since 2×347998861² = 242206414514594642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347998867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24857055 + ... + 24857068.

It is an arithmetic number, because the mean of its divisors is an integer number (99428248).

Almost surely, 2^347998861 is an apocalyptic number.

It is an amenable number.

347998861 is a deficient number, since it is larger than the sum of its proper divisors (49714131).

347998861 is an equidigital number, since it uses as much as digits as its factorization.

347998861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49714130.

The product of its digits is 2612736, while the sum is 55.

The square root of 347998861 is about 18654.7275777482. The cubic root of 347998861 is about 703.3841982086.

It can be divided in two parts, 34799 and 8861, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 347998861 in words is "three hundred forty-seven million, nine hundred ninety-eight thousand, eight hundred sixty-one".