423749986 has 12 divisors (see below), whose sum is σ = 698662566. Its totient is φ = 192613520.

The previous prime is 423749983. The next prime is 423749987. The reversal of 423749986 is 689947324.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 358382761 + 65367225 = 18931^2 + 8085^2 .

It is not an unprimeable number, because it can be changed into a prime (423749983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 875275 + ... + 875758.

Almost surely, 2^423749986 is an apocalyptic number.

423749986 is a deficient number, since it is larger than the sum of its proper divisors (274912580).

423749986 is a wasteful number, since it uses less digits than its factorization.

423749986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751057 (or 1751046 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 52.

The square root of 423749986 is about 20585.1885101886. The cubic root of 423749986 is about 751.1094608012.

The spelling of 423749986 in words is "four hundred twenty-three million, seven hundred forty-nine thousand, nine hundred eighty-six".