427389155 has 4 divisors (see below), whose sum is σ = 512866992. Its totient is φ = 341911320.

The previous prime is 427389139. The next prime is 427389217. The reversal of 427389155 is 551983724.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 427389155 - 2⁴ = 427389139 is a prime.

It is a super-2 number, since 2×427389155² = 365322979623228050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42738911 + ... + 42738920.

It is an arithmetic number, because the mean of its divisors is an integer number (128216748).

Almost surely, 2^427389155 is an apocalyptic number.

427389155 is a deficient number, since it is larger than the sum of its proper divisors (85477837).

427389155 is an equidigital number, since it uses as much as digits as its factorization.

427389155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85477836.

The product of its digits is 302400, while the sum is 44.

The square root of 427389155 is about 20673.3924405261. The cubic root of 427389155 is about 753.2535132012.

The spelling of 427389155 in words is "four hundred twenty-seven million, three hundred eighty-nine thousand, one hundred fifty-five".