427143697 has 4 divisors (see below), whose sum is σ = 441872820. Its totient is φ = 412414576.

The previous prime is 427143643. The next prime is 427143707. The reversal of 427143697 is 796341724.

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 117418896 + 309724801 = 10836^2 + 17599^2 .

It is a cyclic number.

It is not a de Polignac number, because 427143697 - 2⁷ = 427143569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427141697) 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, 7364518 + ... + 7364575.

It is an arithmetic number, because the mean of its divisors is an integer number (110468205).

Almost surely, 2^427143697 is an apocalyptic number.

It is an amenable number.

427143697 is a deficient number, since it is larger than the sum of its proper divisors (14729123).

427143697 is a wasteful number, since it uses less digits than its factorization.

427143697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14729122.

The product of its digits is 254016, while the sum is 43.

The square root of 427143697 is about 20667.4550199099. The cubic root of 427143697 is about 753.1092828157.

The spelling of 427143697 in words is "four hundred twenty-seven million, one hundred forty-three thousand, six hundred ninety-seven".