349801889 has 4 divisors (see below), whose sum is σ = 350118420. Its totient is φ = 349485360.

The previous prime is 349801853. The next prime is 349801901. The reversal of 349801889 is 988108943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 988108943 = 27827 ⋅35509.

It can be written as a sum of positive squares in 2 ways, for example, as 143592289 + 206209600 = 11983^2 + 14360^2 .

It is a cyclic number.

It is not a de Polignac number, because 349801889 - 2¹² = 349797793 is a prime.

It is a super-2 number, since 2×349801889² = 244722723095936642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349801189) 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, 156602 + ... + 158819.

It is an arithmetic number, because the mean of its divisors is an integer number (87529605).

Almost surely, 2^349801889 is an apocalyptic number.

It is an amenable number.

349801889 is a deficient number, since it is larger than the sum of its proper divisors (316531).

349801889 is a wasteful number, since it uses less digits than its factorization.

349801889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316530.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 349801889 is about 18702.9914452207. The cubic root of 349801889 is about 704.5968816919.

The spelling of 349801889 in words is "three hundred forty-nine million, eight hundred one thousand, eight hundred eighty-nine".