427400969 has 4 divisors (see below), whose sum is σ = 427537044. Its totient is φ = 427264896.

The previous prime is 427400959. The next prime is 427400971. The reversal of 427400969 is 969004724.

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

It can be written as a sum of positive squares in 2 ways, for example, as 408565369 + 18835600 = 20213^2 + 4340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427400969 is a prime.

It is a super-2 number, since 2×427400969² = 365343176604277922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427400959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63212 + ... + 69645.

It is an arithmetic number, because the mean of its divisors is an integer number (106884261).

Almost surely, 2^427400969 is an apocalyptic number.

It is an amenable number.

427400969 is a deficient number, since it is larger than the sum of its proper divisors (136075).

427400969 is a wasteful number, since it uses less digits than its factorization.

427400969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136074.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 427400969 is about 20673.6781681441. The cubic root of 427400969 is about 753.2604536792.

The spelling of 427400969 in words is "four hundred twenty-seven million, four hundred thousand, nine hundred sixty-nine".