3752912981 has 2 divisors, whose sum is σ = 3752912982. Its totient is φ = 3752912980.

The previous prime is 3752912963. The next prime is 3752912993. The reversal of 3752912981 is 1892192573.

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., 2316881956 + 1436031025 = 48134^2 + 37895^2 .

It is an emirp because it is prime and its reverse (1892192573) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3752912981 is a prime.

It is a super-2 number, since 2×3752912981² = 28168711685916612722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3752912951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1876456490 + 1876456491.

It is an arithmetic number, because the mean of its divisors is an integer number (1876456491).

Almost surely, 2^3752912981 is an apocalyptic number.

It is an amenable number.

3752912981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3752912981 is an equidigital number, since it uses as much as digits as its factorization.

3752912981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 3752912981 is about 61261.0233427422. The cubic root of 3752912981 is about 1554.0184292699.

The spelling of 3752912981 in words is "three billion, seven hundred fifty-two million, nine hundred twelve thousand, nine hundred eighty-one".