407645393 has 4 divisors (see below), whose sum is σ = 411681588. Its totient is φ = 403609200.

The previous prime is 407645389. The next prime is 407645423. The reversal of 407645393 is 393546704.

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 287370304 + 120275089 = 16952^2 + 10967^2 .

It is a cyclic number.

It is not a de Polignac number, because 407645393 - 2² = 407645389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 407645393.

It is not an unprimeable number, because it can be changed into a prime (407645093) 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, 2017946 + ... + 2018147.

It is an arithmetic number, because the mean of its divisors is an integer number (102920397).

Almost surely, 2^407645393 is an apocalyptic number.

It is an amenable number.

407645393 is a deficient number, since it is larger than the sum of its proper divisors (4036195).

407645393 is a wasteful number, since it uses less digits than its factorization.

407645393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036194.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 407645393 is about 20190.2301373709. The cubic root of 407645393 is about 741.4710165460.

The spelling of 407645393 in words is "four hundred seven million, six hundred forty-five thousand, three hundred ninety-three".