126723897 has 6 divisors (see below), whose sum is σ = 183045642. Its totient is φ = 84482592.

The previous prime is 126723893. The next prime is 126723911. The reversal of 126723897 is 798327621.

126723897 is a `hidden beast` number, since 1 + 267 + 2 + 389 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77105961 + 49617936 = 8781^2 + 7044^2 .

It is not a de Polignac number, because 126723897 - 2² = 126723893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126723893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7040208 + ... + 7040225.

It is an arithmetic number, because the mean of its divisors is an integer number (30507607).

Almost surely, 2^126723897 is an apocalyptic number.

It is an amenable number.

126723897 is a deficient number, since it is larger than the sum of its proper divisors (56321745).

126723897 is a wasteful number, since it uses less digits than its factorization.

126723897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14080439 (or 14080436 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 126723897 is about 11257.1709145771. The cubic root of 126723897 is about 502.2880430801.

The spelling of 126723897 in words is "one hundred twenty-six million, seven hundred twenty-three thousand, eight hundred ninety-seven".