3481649257 has 4 divisors (see below), whose sum is σ = 3481806916. Its totient is φ = 3481491600.

The previous prime is 3481649251. The next prime is 3481649267. The reversal of 3481649257 is 7529461843.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1547320896 + 1934328361 = 39336^2 + 43981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3481649257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3481649257.

It is not an unprimeable number, because it can be changed into a prime (3481649251) 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, 38994 + ... + 92107.

It is an arithmetic number, because the mean of its divisors is an integer number (870451729).

Almost surely, 2^3481649257 is an apocalyptic number.

It is an amenable number.

3481649257 is a deficient number, since it is larger than the sum of its proper divisors (157659).

3481649257 is a wasteful number, since it uses less digits than its factorization.

3481649257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157658.

The product of its digits is 1451520, while the sum is 49.

The square root of 3481649257 is about 59005.5019214310. The cubic root of 3481649257 is about 1515.6363270727.

The spelling of 3481649257 in words is "three billion, four hundred eighty-one million, six hundred forty-nine thousand, two hundred fifty-seven".