349747925 has 6 divisors (see below), whose sum is σ = 433687458. Its totient is φ = 279798320.

The previous prime is 349747889. The next prime is 349747943. The reversal of 349747925 is 529747943.

It can be written as a sum of positive squares in 3 ways, for example, as 14455204 + 335292721 = 3802^2 + 18311^2 .

It is not a de Polignac number, because 349747925 - 2⁸ = 349747669 is a prime.

It is a super-2 number, since 2×349747925² = 244647222083611250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6994934 + ... + 6994983.

It is an arithmetic number, because the mean of its divisors is an integer number (72281243).

Almost surely, 2^349747925 is an apocalyptic number.

It is an amenable number.

349747925 is a deficient number, since it is larger than the sum of its proper divisors (83939533).

349747925 is a wasteful number, since it uses less digits than its factorization.

349747925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13989927 (or 13989922 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 50.

The square root of 349747925 is about 18701.5487326585. The cubic root of 349747925 is about 704.5606470662.

The spelling of 349747925 in words is "three hundred forty-nine million, seven hundred forty-seven thousand, nine hundred twenty-five".