126989747 has 2 divisors, whose sum is σ = 126989748. Its totient is φ = 126989746.

The previous prime is 126989743. The next prime is 126989761. The reversal of 126989747 is 747989621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126989747 - 2² = 126989743 is a prime.

It is a super-2 number, since 2×126989747² = 32252791686248018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126989743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63494873 + 63494874.

It is an arithmetic number, because the mean of its divisors is an integer number (63494874).

Almost surely, 2^126989747 is an apocalyptic number.

126989747 is a deficient number, since it is larger than the sum of its proper divisors (1).

126989747 is an equidigital number, since it uses as much as digits as its factorization.

126989747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 53.

The square root of 126989747 is about 11268.9727570884. The cubic root of 126989747 is about 502.6390424041.

The spelling of 126989747 in words is "one hundred twenty-six million, nine hundred eighty-nine thousand, seven hundred forty-seven".