126976789 has 2 divisors, whose sum is σ = 126976790. Its totient is φ = 126976788.

The previous prime is 126976781. The next prime is 126976841. The reversal of 126976789 is 987679621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111999889 + 14976900 = 10583^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 126976789 - 2³ = 126976781 is a prime.

It is a super-3 number, since 3×126976789³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126976781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63488394 + 63488395.

It is an arithmetic number, because the mean of its divisors is an integer number (63488395).

Almost surely, 2^126976789 is an apocalyptic number.

It is an amenable number.

126976789 is a deficient number, since it is larger than the sum of its proper divisors (1).

126976789 is an equidigital number, since it uses as much as digits as its factorization.

126976789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 55.

The square root of 126976789 is about 11268.3978009298. The cubic root of 126976789 is about 502.6219454378.

It can be divided in two parts, 126976 and 789, that added together give a triangular number (127765 = T₅₀₅).

The spelling of 126976789 in words is "one hundred twenty-six million, nine hundred seventy-six thousand, seven hundred eighty-nine".