349971769 has 12 divisors (see below), whose sum is σ = 408900900. Its totient is φ = 298656288.

The previous prime is 349971761. The next prime is 349971779. The reversal of 349971769 is 967179943.

It can be written as a sum of positive squares in 2 ways, for example, as 180633600 + 169338169 = 13440^2 + 13013^2 .

It is not a de Polignac number, because 349971769 - 2³ = 349971761 is a prime.

It is a super-2 number, since 2×349971769² = 244960478193978722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349971761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4374 + ... + 26815.

It is an arithmetic number, because the mean of its divisors is an integer number (34075075).

Almost surely, 2^349971769 is an apocalyptic number.

It is an amenable number.

349971769 is a deficient number, since it is larger than the sum of its proper divisors (58929131).

349971769 is a wasteful number, since it uses less digits than its factorization.

349971769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31432 (or 31425 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 55.

The square root of 349971769 is about 18707.5324134425. The cubic root of 349971769 is about 704.7109248598.

The spelling of 349971769 in words is "three hundred forty-nine million, nine hundred seventy-one thousand, seven hundred sixty-nine".