1026981797 has 2 divisors, whose sum is σ = 1026981798. Its totient is φ = 1026981796.

The previous prime is 1026981773. The next prime is 1026981799. The reversal of 1026981797 is 7971896201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1018950241 + 8031556 = 31921^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026981797 - 2¹⁴ = 1026965413 is a prime.

It is a super-2 number, since 2×1026981797² = 2109383222738698418, which contains 22 as substring.

Together with 1026981799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1026981799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513490898 + 513490899.

It is an arithmetic number, because the mean of its divisors is an integer number (513490899).

Almost surely, 2^1026981797 is an apocalyptic number.

It is an amenable number.

1026981797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026981797 is an equidigital number, since it uses as much as digits as its factorization.

1026981797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 50.

The square root of 1026981797 is about 32046.5567105110. The cubic root of 1026981797 is about 1008.9142326704.

The spelling of 1026981797 in words is "one billion, twenty-six million, nine hundred eighty-one thousand, seven hundred ninety-seven".