1072917691 has 2 divisors, whose sum is σ = 1072917692. Its totient is φ = 1072917690.

The previous prime is 1072917623. The next prime is 1072917709. The reversal of 1072917691 is 1967192701.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1072917691 - 2¹⁹ = 1072393403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1072917191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536458845 + 536458846.

It is an arithmetic number, because the mean of its divisors is an integer number (536458846).

Almost surely, 2^1072917691 is an apocalyptic number.

1072917691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1072917691 is an equidigital number, since it uses as much as digits as its factorization.

1072917691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 43.

The square root of 1072917691 is about 32755.4223144810. The cubic root of 1072917691 is about 1023.7379481189.

The spelling of 1072917691 in words is "one billion, seventy-two million, nine hundred seventeen thousand, six hundred ninety-one".