426689979 has 8 divisors (see below), whose sum is σ = 569785920. Its totient is φ = 284027016.

The previous prime is 426689933. The next prime is 426690023. The reversal of 426689979 is 979986624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 426689979 - 2⁸ = 426689723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426685979) by changing a digit.

It is a Zeisel number, with parameters (328, -325).

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105937 + ... + 109890.

It is an arithmetic number, because the mean of its divisors is an integer number (71223240).

Almost surely, 2^426689979 is an apocalyptic number.

426689979 is a deficient number, since it is larger than the sum of its proper divisors (143095941).

426689979 is a wasteful number, since it uses less digits than its factorization.

426689979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216489.

The product of its digits is 11757312, while the sum is 60.

The square root of 426689979 is about 20656.4754738072. The cubic root of 426689979 is about 752.8425339461.

The spelling of 426689979 in words is "four hundred twenty-six million, six hundred eighty-nine thousand, nine hundred seventy-nine".