42651993 has 8 divisors (see below), whose sum is σ = 57801856. Its totient is φ = 27968400.

The previous prime is 42651971. The next prime is 42652003. The reversal of 42651993 is 39915624.

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

It is not a de Polignac number, because 42651993 - 2⁹ = 42651481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42651493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116353 + ... + 116718.

It is an arithmetic number, because the mean of its divisors is an integer number (7225232).

Almost surely, 2^42651993 is an apocalyptic number.

It is an amenable number.

42651993 is a deficient number, since it is larger than the sum of its proper divisors (15149863).

42651993 is a wasteful number, since it uses less digits than its factorization.

42651993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233135.

The product of its digits is 58320, while the sum is 39.

The square root of 42651993 is about 6530.8493322079. The cubic root of 42651993 is about 349.3921230872.

The spelling of 42651993 in words is "forty-two million, six hundred fifty-one thousand, nine hundred ninety-three".