1010956781 has 2 divisors, whose sum is σ = 1010956782. Its totient is φ = 1010956780.

The previous prime is 1010956757. The next prime is 1010956787. The reversal of 1010956781 is 1876590101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860894281 + 150062500 = 29341^2 + 12250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010956781 is a prime.

It is a super-2 number, since 2×1010956781² = 2044067226099763922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010956787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505478390 + 505478391.

It is an arithmetic number, because the mean of its divisors is an integer number (505478391).

Almost surely, 2^1010956781 is an apocalyptic number.

It is an amenable number.

1010956781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010956781 is an equidigital number, since it uses as much as digits as its factorization.

1010956781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 1010956781 is about 31795.5465592274. The cubic root of 1010956781 is about 1003.6390019353.

The spelling of 1010956781 in words is "one billion, ten million, nine hundred fifty-six thousand, seven hundred eighty-one".