1051216693 has 2 divisors, whose sum is σ = 1051216694. Its totient is φ = 1051216692.

The previous prime is 1051216651. The next prime is 1051216729. The reversal of 1051216693 is 3966121501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848382129 + 202834564 = 29127^2 + 14242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051216693 is a prime.

It is a super-2 number, since 2×1051216693² = 2210113071283712498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051216643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525608346 + 525608347.

It is an arithmetic number, because the mean of its divisors is an integer number (525608347).

Almost surely, 2^1051216693 is an apocalyptic number.

It is an amenable number.

1051216693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051216693 is an equidigital number, since it uses as much as digits as its factorization.

1051216693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1051216693 is about 32422.4720371535. The cubic root of 1051216693 is about 1016.7887901433.

The spelling of 1051216693 in words is "one billion, fifty-one million, two hundred sixteen thousand, six hundred ninety-three".