1051606891 has 2 divisors, whose sum is σ = 1051606892. Its totient is φ = 1051606890.

The previous prime is 1051606883. The next prime is 1051606901. The reversal of 1051606891 is 1986061501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1051606891 - 2³ = 1051606883 is a prime.

It is a super-2 number, since 2×1051606891² = 2211754106397371762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1051606891.

It is not a weakly prime, because it can be changed into another prime (1051606691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525803445 + 525803446.

It is an arithmetic number, because the mean of its divisors is an integer number (525803446).

Almost surely, 2^1051606891 is an apocalyptic number.

1051606891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051606891 is an equidigital number, since it uses as much as digits as its factorization.

1051606891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 1051606891 is about 32428.4888793789. The cubic root of 1051606891 is about 1016.9145808503.

The spelling of 1051606891 in words is "one billion, fifty-one million, six hundred six thousand, eight hundred ninety-one".