126719897 has 4 divisors (see below), whose sum is σ = 128455860. Its totient is φ = 124983936.

The previous prime is 126719893. The next prime is 126719899. The reversal of 126719897 is 798917621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798917621 = 73 ⋅10944077.

It can be written as a sum of positive squares in 2 ways, for example, as 59660176 + 67059721 = 7724^2 + 8189^2 .

It is a cyclic number.

It is not a de Polignac number, because 126719897 - 2² = 126719893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126719893) 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, 867872 + ... + 868017.

It is an arithmetic number, because the mean of its divisors is an integer number (32113965).

Almost surely, 2^126719897 is an apocalyptic number.

It is an amenable number.

126719897 is a deficient number, since it is larger than the sum of its proper divisors (1735963).

126719897 is an equidigital number, since it uses as much as digits as its factorization.

126719897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735962.

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

The square root of 126719897 is about 11256.9932486433. The cubic root of 126719897 is about 502.2827581697.

The spelling of 126719897 in words is "one hundred twenty-six million, seven hundred nineteen thousand, eight hundred ninety-seven".