1026378877 has 2 divisors, whose sum is σ = 1026378878. Its totient is φ = 1026378876.

The previous prime is 1026378851. The next prime is 1026378943. The reversal of 1026378877 is 7788736201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755480196 + 270898681 = 27486^2 + 16459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1026378877 is a prime.

It is a super-2 number, since 2×1026378877² = 2106907198303562258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1026378877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1026372877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513189438 + 513189439.

It is an arithmetic number, because the mean of its divisors is an integer number (513189439).

Almost surely, 2^1026378877 is an apocalyptic number.

It is an amenable number.

1026378877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026378877 is an equidigital number, since it uses as much as digits as its factorization.

1026378877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 1026378877 is about 32037.1483905793. The cubic root of 1026378877 is about 1008.7167563864.

The spelling of 1026378877 in words is "one billion, twenty-six million, three hundred seventy-eight thousand, eight hundred seventy-seven".