349703684621 has 4 divisors (see below), whose sum is σ = 364908192672. Its totient is φ = 334499176572.

The previous prime is 349703684611. The next prime is 349703684623. The reversal of 349703684621 is 126486307943.

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 349703684621 - 2⁶ = 349703684557 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 (349703684623) 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, 7602253991 + ... + 7602254036.

It is an arithmetic number, because the mean of its divisors is an integer number (91227048168).

Almost surely, 2^349703684621 is an apocalyptic number.

It is an amenable number.

349703684621 is a deficient number, since it is larger than the sum of its proper divisors (15204508051).

349703684621 is a wasteful number, since it uses less digits than its factorization.

349703684621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15204508050.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 349703684621 in words is "three hundred forty-nine billion, seven hundred three million, six hundred eighty-four thousand, six hundred twenty-one".