642341093 has 4 divisors (see below), whose sum is σ = 642963948. Its totient is φ = 641718240.

The previous prime is 642341087. The next prime is 642341099. The reversal of 642341093 is 390143246.

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

It is an interprime number because it is at equal distance from previous prime (642341087) and next prime (642341099).

It can be written as a sum of positive squares in 2 ways, for example, as 394499044 + 247842049 = 19862^2 + 15743^2 .

It is a cyclic number.

It is not a de Polignac number, because 642341093 - 2¹² = 642336997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642341099) 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, 309878 + ... + 311943.

It is an arithmetic number, because the mean of its divisors is an integer number (160740987).

Almost surely, 2^642341093 is an apocalyptic number.

It is an amenable number.

642341093 is a deficient number, since it is larger than the sum of its proper divisors (622855).

642341093 is a wasteful number, since it uses less digits than its factorization.

642341093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622854.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 642341093 is about 25344.4489583025. The cubic root of 642341093 is about 862.8233748710.

The spelling of 642341093 in words is "six hundred forty-two million, three hundred forty-one thousand, ninety-three".