3549694381 has 2 divisors, whose sum is σ = 3549694382. Its totient is φ = 3549694380.

The previous prime is 3549694303. The next prime is 3549694391. The reversal of 3549694381 is 1834969453.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3369222025 + 180472356 = 58045^2 + 13434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3549694381 is a prime.

It is a super-2 number, since 2×3549694381² = 25200660397005946322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3549694301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1774847190 + 1774847191.

It is an arithmetic number, because the mean of its divisors is an integer number (1774847191).

Almost surely, 2^3549694381 is an apocalyptic number.

It is an amenable number.

3549694381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3549694381 is an equidigital number, since it uses as much as digits as its factorization.

3549694381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 52.

The square root of 3549694381 is about 59579.3116861885. The cubic root of 3549694381 is about 1525.4465242289.

The spelling of 3549694381 in words is "three billion, five hundred forty-nine million, six hundred ninety-four thousand, three hundred eighty-one".