347657490421 has 4 divisors (see below), whose sum is σ = 368107931052. Its totient is φ = 327207049792.

The previous prime is 347657490413. The next prime is 347657490437. The reversal of 347657490421 is 124094756743.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101353726321 + 246303764100 = 318361^2 + 496290^2 .

It is a cyclic number.

It is not a de Polignac number, because 347657490421 - 2³ = 347657490413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347657490451) 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, 10225220290 + ... + 10225220323.

It is an arithmetic number, because the mean of its divisors is an integer number (92026982763).

Almost surely, 2^347657490421 is an apocalyptic number.

It is an amenable number.

347657490421 is a deficient number, since it is larger than the sum of its proper divisors (20450440631).

347657490421 is a wasteful number, since it uses less digits than its factorization.

347657490421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20450440630.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 347657490421 in words is "three hundred forty-seven billion, six hundred fifty-seven million, four hundred ninety thousand, four hundred twenty-one".