347977 has 4 divisors (see below), whose sum is σ = 397696. Its totient is φ = 298260.

The previous prime is 347969. The next prime is 347981. The reversal of 347977 is 779743.

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, and also an emirpimes, since its reverse is a distinct semiprime: 779743 = 31 ⋅25153.

It is a cyclic number.

It is not a de Polignac number, because 347977 - 2³ = 347969 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (347957) 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, 24849 + ... + 24862.

It is an arithmetic number, because the mean of its divisors is an integer number (99424).

2³⁴⁷⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

347977 is a deficient number, since it is larger than the sum of its proper divisors (49719).

347977 is an equidigital number, since it uses as much as digits as its factorization.

347977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49718.

The product of its digits is 37044, while the sum is 37.

The square root of 347977 is about 589.8957535023. The cubic root of 347977 is about 70.3369469229.

The spelling of 347977 in words is "three hundred forty-seven thousand, nine hundred seventy-seven".