347421631 has 4 divisors (see below), whose sum is σ = 365707000. Its totient is φ = 329136264.

The previous prime is 347421629. The next prime is 347421643. The reversal of 347421631 is 136124743.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136124743 = 331 ⋅411253.

It is a cyclic number.

It is not a de Polignac number, because 347421631 - 2¹ = 347421629 is a prime.

It is a super-2 number, since 2×347421631² = 241403579373400322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 347421593 and 347421602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347421611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9142656 + ... + 9142693.

It is an arithmetic number, because the mean of its divisors is an integer number (91426750).

Almost surely, 2^347421631 is an apocalyptic number.

347421631 is a deficient number, since it is larger than the sum of its proper divisors (18285369).

347421631 is a wasteful number, since it uses less digits than its factorization.

347421631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18285368.

The product of its digits is 12096, while the sum is 31.

The square root of 347421631 is about 18639.2497434848. The cubic root of 347421631 is about 702.9950789706.

The spelling of 347421631 in words is "three hundred forty-seven million, four hundred twenty-one thousand, six hundred thirty-one".