642373 has 2 divisors, whose sum is σ = 642374. Its totient is φ = 642372.

The previous prime is 642361. The next prime is 642403. The reversal of 642373 is 373246.

642373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 550564 + 91809 = 742^2 + 303^2 .

It is a cyclic number.

It is not a de Polignac number, because 642373 - 2¹³ = 634181 is a prime.

It is a super-2 number, since 2×642373² = 825286142258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321186 + 321187.

It is an arithmetic number, because the mean of its divisors is an integer number (321187).

2⁶⁴²³⁷³ is an apocalyptic number.

It is an amenable number.

642373 is a deficient number, since it is larger than the sum of its proper divisors (1).

642373 is an equidigital number, since it uses as much as digits as its factorization.

642373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 25.

The square root of 642373 is about 801.4817527555. The cubic root of 642373 is about 86.2837660972.

The spelling of 642373 in words is "six hundred forty-two thousand, three hundred seventy-three".