427691139 has 8 divisors (see below), whose sum is σ = 576134160. Its totient is φ = 282187776.

The previous prime is 427691111. The next prime is 427691153. The reversal of 427691139 is 931196724.

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

It is not a de Polignac number, because 427691139 - 2¹¹ = 427689091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427691139.

It is not an unprimeable number, because it can be changed into a prime (427691179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734574 + ... + 735155.

It is an arithmetic number, because the mean of its divisors is an integer number (72016770).

Almost surely, 2^427691139 is an apocalyptic number.

427691139 is a deficient number, since it is larger than the sum of its proper divisors (148443021).

427691139 is a wasteful number, since it uses less digits than its factorization.

427691139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469829.

The product of its digits is 81648, while the sum is 42.

The square root of 427691139 is about 20680.6948384236. The cubic root of 427691139 is about 753.4308823522.

The spelling of 427691139 in words is "four hundred twenty-seven million, six hundred ninety-one thousand, one hundred thirty-nine".