2912411981 has 2 divisors, whose sum is σ = 2912411982. Its totient is φ = 2912411980.

The previous prime is 2912411959. The next prime is 2912411987. The reversal of 2912411981 is 1891142192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2300641225 + 611770756 = 47965^2 + 24734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2912411981 - 2²² = 2908217677 is a prime.

It is a super-2 number, since 2×2912411981² = 16964287094144688722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2912411987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1456205990 + 1456205991.

It is an arithmetic number, because the mean of its divisors is an integer number (1456205991).

Almost surely, 2^2912411981 is an apocalyptic number.

It is an amenable number.

2912411981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2912411981 is an equidigital number, since it uses as much as digits as its factorization.

2912411981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 2912411981 is about 53966.7673758583. The cubic root of 2912411981 is about 1428.0747366056.

The spelling of 2912411981 in words is "two billion, nine hundred twelve million, four hundred eleven thousand, nine hundred eighty-one".