1006986881 has 2 divisors, whose sum is σ = 1006986882. Its totient is φ = 1006986880.

The previous prime is 1006986859. The next prime is 1006986887. The reversal of 1006986881 is 1886896001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 635846656 + 371140225 = 25216^2 + 19265^2 .

It is an emirp because it is prime and its reverse (1886896001) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1889869001 and 1009689881.

It is a cyclic number.

It is not a de Polignac number, because 1006986881 - 2⁶ = 1006986817 is a prime.

It is a super-2 number, since 2×1006986881² = 2028045157012216322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1006986887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503493440 + 503493441.

It is an arithmetic number, because the mean of its divisors is an integer number (503493441).

Almost surely, 2^1006986881 is an apocalyptic number.

It is an amenable number.

1006986881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006986881 is an equidigital number, since it uses as much as digits as its factorization.

1006986881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 1006986881 is about 31733.0565971827. The cubic root of 1006986881 is about 1002.3235572336.

The spelling of 1006986881 in words is "one billion, six million, nine hundred eighty-six thousand, eight hundred eighty-one".