1059781997 has 4 divisors (see below), whose sum is σ = 1074708576. Its totient is φ = 1044855420.

The previous prime is 1059781993. The next prime is 1059782041. The reversal of 1059781997 is 7991879501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1059781997 - 2² = 1059781993 is a prime.

It is a super-2 number, since 2×1059781997² = 2246275762330616018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1059781993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7463183 + ... + 7463324.

It is an arithmetic number, because the mean of its divisors is an integer number (268677144).

Almost surely, 2^1059781997 is an apocalyptic number.

It is an amenable number.

1059781997 is a deficient number, since it is larger than the sum of its proper divisors (14926579).

1059781997 is an equidigital number, since it uses as much as digits as its factorization.

1059781997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14926578.

The product of its (nonzero) digits is 1428840, while the sum is 56.

The square root of 1059781997 is about 32554.2930655851. The cubic root of 1059781997 is about 1019.5429186819.

The spelling of 1059781997 in words is "one billion, fifty-nine million, seven hundred eighty-one thousand, nine hundred ninety-seven".