427209690745 has 4 divisors (see below), whose sum is σ = 512651628900. Its totient is φ = 341767752592.

The previous prime is 427209690727. The next prime is 427209690751. The reversal of 427209690745 is 547096902724.

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 131695684201 + 295514006544 = 362899^2 + 543612^2 .

It is a cyclic number.

It is not a de Polignac number, because 427209690745 - 2¹³ = 427209682553 is a prime.

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, 42720969070 + ... + 42720969079.

It is an arithmetic number, because the mean of its divisors is an integer number (128162907225).

Almost surely, 2^427209690745 is an apocalyptic number.

It is an amenable number.

427209690745 is a deficient number, since it is larger than the sum of its proper divisors (85441938155).

427209690745 is an equidigital number, since it uses as much as digits as its factorization.

427209690745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85441938154.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 427209690745 in words is "four hundred twenty-seven billion, two hundred nine million, six hundred ninety thousand, seven hundred forty-five".