3521374949 has 4 divisors (see below), whose sum is σ = 3569613036. Its totient is φ = 3473136864.

The previous prime is 3521374903. The next prime is 3521374981. The reversal of 3521374949 is 9494731253.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9494731253 = 7 ⋅1356390179.

It can be written as a sum of positive squares in 2 ways, for example, as 795804100 + 2725570849 = 28210^2 + 52207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3521374949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521370949) 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, 24118934 + ... + 24119079.

It is an arithmetic number, because the mean of its divisors is an integer number (892403259).

Almost surely, 2^3521374949 is an apocalyptic number.

It is an amenable number.

3521374949 is a deficient number, since it is larger than the sum of its proper divisors (48238087).

3521374949 is an equidigital number, since it uses as much as digits as its factorization.

3521374949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48238086.

The product of its digits is 816480, while the sum is 47.

The square root of 3521374949 is about 59341.1741457818. The cubic root of 3521374949 is about 1521.3790216157.

The spelling of 3521374949 in words is "three billion, five hundred twenty-one million, three hundred seventy-four thousand, nine hundred forty-nine".