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42108623 is a prime number
BaseRepresentation
bin1010000010100…
…0011011001111
32221020100011122
42200220123033
541234433443
64102311155
71020626444
oct240503317
987210148
1042108623
1121850917
12121284bb
13895455b
1458419cb
153a6b968
hex28286cf

42108623 has 2 divisors, whose sum is σ = 42108624. Its totient is φ = 42108622.

The previous prime is 42108613. The next prime is 42108631. The reversal of 42108623 is 32680124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42108623 - 26 = 42108559 is a prime.

It is a super-2 number, since 2×421086232 = 3546272261912258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42108592 and 42108601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42108613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21054311 + 21054312.

It is an arithmetic number, because the mean of its divisors is an integer number (21054312).

Almost surely, 242108623 is an apocalyptic number.

42108623 is a deficient number, since it is larger than the sum of its proper divisors (1).

42108623 is an equidigital number, since it uses as much as digits as its factorization.

42108623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 42108623 is about 6489.1157332875. The cubic root of 42108623 is about 347.9020703658.

Adding to 42108623 its reverse (32680124), we get a palindrome (74788747).

The spelling of 42108623 in words is "forty-two million, one hundred eight thousand, six hundred twenty-three".