1206893381 has 2 divisors, whose sum is σ = 1206893382. Its totient is φ = 1206893380.

The previous prime is 1206893371. The next prime is 1206893399. The reversal of 1206893381 is 1833986021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200969025 + 5924356 = 34655^2 + 2434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206893381 - 2¹⁴ = 1206876997 is a prime.

It is a super-2 number, since 2×1206893381² = 2913183266203222322, 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 (1206893371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603446690 + 603446691.

It is an arithmetic number, because the mean of its divisors is an integer number (603446691).

Almost surely, 2^1206893381 is an apocalyptic number.

It is an amenable number.

1206893381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206893381 is an equidigital number, since it uses as much as digits as its factorization.

1206893381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1206893381 is about 34740.3710544375. The cubic root of 1206893381 is about 1064.6894937032.

The spelling of 1206893381 in words is "one billion, two hundred six million, eight hundred ninety-three thousand, three hundred eighty-one".