427893691 has 4 divisors (see below), whose sum is σ = 434280232. Its totient is φ = 421507152.

The previous prime is 427893667. The next prime is 427893703. The reversal of 427893691 is 196398724.

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

It is a cyclic number.

It is not a de Polignac number, because 427893691 - 2⁵ = 427893659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427893601) 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, 3193170 + ... + 3193303.

It is an arithmetic number, because the mean of its divisors is an integer number (108570058).

Almost surely, 2^427893691 is an apocalyptic number.

427893691 is a deficient number, since it is larger than the sum of its proper divisors (6386541).

427893691 is an equidigital number, since it uses as much as digits as its factorization.

427893691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6386540.

The product of its digits is 653184, while the sum is 49.

The square root of 427893691 is about 20685.5913862766. The cubic root of 427893691 is about 753.5498037209.

It can be divided in two parts, 4278 and 93691, that added together give a square (97969 = 313²).

The spelling of 427893691 in words is "four hundred twenty-seven million, eight hundred ninety-three thousand, six hundred ninety-one".