349897789789 has 4 divisors (see below), whose sum is σ = 352652890624. Its totient is φ = 347142688956.

The previous prime is 349897789771. The next prime is 349897789799. The reversal of 349897789789 is 987987798943.

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: 987987798943 = 2383 ⋅414598321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349897789789 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 (349897789739) 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, 1377550227 + ... + 1377550480.

It is an arithmetic number, because the mean of its divisors is an integer number (88163222656).

Almost surely, 2^349897789789 is an apocalyptic number.

It is an amenable number.

349897789789 is a deficient number, since it is larger than the sum of its proper divisors (2755100835).

349897789789 is a wasteful number, since it uses less digits than its factorization.

349897789789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755100834.

The product of its digits is 13826598912, while the sum is 88.

The spelling of 349897789789 in words is "three hundred forty-nine billion, eight hundred ninety-seven million, seven hundred eighty-nine thousand, seven hundred eighty-nine".