3725979281 has 2 divisors, whose sum is σ = 3725979282. Its totient is φ = 3725979280.

The previous prime is 3725979253. The next prime is 3725979293. The reversal of 3725979281 is 1829795273.

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., 2938615681 + 787363600 = 54209^2 + 28060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3725979281 is a prime.

It is a super-2 number, since 2×3725979281² = 27765843204882553922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3725973281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1862989640 + 1862989641.

It is an arithmetic number, because the mean of its divisors is an integer number (1862989641).

Almost surely, 2^3725979281 is an apocalyptic number.

It is an amenable number.

3725979281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3725979281 is an equidigital number, since it uses as much as digits as its factorization.

3725979281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 3725979281 is about 61040.8001340087. The cubic root of 3725979281 is about 1550.2919021524.

The spelling of 3725979281 in words is "three billion, seven hundred twenty-five million, nine hundred seventy-nine thousand, two hundred eighty-one".