126623986 has 4 divisors (see below), whose sum is σ = 189935982. Its totient is φ = 63311992.

The previous prime is 126623963. The next prime is 126623989. The reversal of 126623986 is 689326621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689326621 = 8009 ⋅86069.

It can be written as a sum of positive squares in only one way, i.e., 110775625 + 15848361 = 10525^2 + 3981^2 .

It is not an unprimeable number, because it can be changed into a prime (126623989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31655995 + ... + 31655998.

Almost surely, 2^126623986 is an apocalyptic number.

126623986 is a deficient number, since it is larger than the sum of its proper divisors (63311996).

126623986 is an equidigital number, since it uses as much as digits as its factorization.

126623986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63311995.

The product of its digits is 186624, while the sum is 43.

The square root of 126623986 is about 11252.7323792935. The cubic root of 126623986 is about 502.1560045926.

It can be divided in two parts, 1266 and 23986, that added together give a palindrome (25252).

The spelling of 126623986 in words is "one hundred twenty-six million, six hundred twenty-three thousand, nine hundred eighty-six".