642403167 has 32 divisors (see below), whose sum is σ = 1033566720. Its totient is φ = 346705920.

The previous prime is 642403159. The next prime is 642403183. The reversal of 642403167 is 761304246.

It is a happy number.

It is not a de Polignac number, because 642403167 - 2³ = 642403159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642403117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138567 + ... + 143127.

It is an arithmetic number, because the mean of its divisors is an integer number (32298960).

Almost surely, 2^642403167 is an apocalyptic number.

642403167 is a deficient number, since it is larger than the sum of its proper divisors (391163553).

642403167 is a wasteful number, since it uses less digits than its factorization.

642403167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 642403167 is about 25345.6735361284. The cubic root of 642403167 is about 862.8511675674.

The spelling of 642403167 in words is "six hundred forty-two million, four hundred three thousand, one hundred sixty-seven".