42923905 has 8 divisors (see below), whose sum is σ = 52480872. Its totient is φ = 33691008.

The previous prime is 42923887. The next prime is 42923971. The reversal of 42923905 is 50932924.

It can be written as a sum of positive squares in 4 ways, for example, as 7485696 + 35438209 = 2736^2 + 5953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42923905 - 2¹⁵ = 42891137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80724 + ... + 81253.

It is an arithmetic number, because the mean of its divisors is an integer number (6560109).

Almost surely, 2^42923905 is an apocalyptic number.

It is an amenable number.

42923905 is a deficient number, since it is larger than the sum of its proper divisors (9556967).

42923905 is a wasteful number, since it uses less digits than its factorization.

42923905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162035.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 42923905 is about 6551.6337657107. The cubic root of 42923905 is about 350.1330242651.

The spelling of 42923905 in words is "forty-two million, nine hundred twenty-three thousand, nine hundred five".