412372781 has 2 divisors, whose sum is σ = 412372782. Its totient is φ = 412372780.

The previous prime is 412372777. The next prime is 412372813. The reversal of 412372781 is 187273214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337273225 + 75099556 = 18365^2 + 8666^2 .

It is a cyclic number.

It is not a de Polignac number, because 412372781 - 2² = 412372777 is a prime.

It is a super-2 number, since 2×412372781² = 340102621019347922, 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 (412362781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206186390 + 206186391.

It is an arithmetic number, because the mean of its divisors is an integer number (206186391).

Almost surely, 2^412372781 is an apocalyptic number.

It is an amenable number.

412372781 is a deficient number, since it is larger than the sum of its proper divisors (1).

412372781 is an equidigital number, since it uses as much as digits as its factorization.

412372781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 35.

The square root of 412372781 is about 20306.9638547962. The cubic root of 412372781 is about 744.3262415968.

The spelling of 412372781 in words is "four hundred twelve million, three hundred seventy-two thousand, seven hundred eighty-one".