347938473721 has 16 divisors (see below), whose sum is σ = 374225220864. Its totient is φ = 322646601024.

The previous prime is 347938473719. The next prime is 347938473749. The reversal of 347938473721 is 127374839743.

It is a happy number.

It is not a de Polignac number, because 347938473721 - 2¹ = 347938473719 is a prime.

It is a super-2 number, since 2×347938473721² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (347938473761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502285 + ... + 973738.

It is an arithmetic number, because the mean of its divisors is an integer number (23389076304).

Almost surely, 2^347938473721 is an apocalyptic number.

It is an amenable number.

347938473721 is a deficient number, since it is larger than the sum of its proper divisors (26286747143).

347938473721 is a wasteful number, since it uses less digits than its factorization.

347938473721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476360.

The product of its digits is 21337344, while the sum is 58.

The spelling of 347938473721 in words is "three hundred forty-seven billion, nine hundred thirty-eight million, four hundred seventy-three thousand, seven hundred twenty-one".