42368991 has 16 divisors (see below), whose sum is σ = 65528064. Its totient is φ = 23848704.

The previous prime is 42368983. The next prime is 42369017. The reversal of 42368991 is 19986324.

It is not a de Polignac number, because 42368991 - 2³ = 42368983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42368941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13650 + ... + 16463.

It is an arithmetic number, because the mean of its divisors is an integer number (4095504).

Almost surely, 2^42368991 is an apocalyptic number.

42368991 is a deficient number, since it is larger than the sum of its proper divisors (23159073).

42368991 is a wasteful number, since it uses less digits than its factorization.

42368991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30190.

The product of its digits is 93312, while the sum is 42.

The square root of 42368991 is about 6509.1467182727. The cubic root of 42368991 is about 348.6176522776.

The spelling of 42368991 in words is "forty-two million, three hundred sixty-eight thousand, nine hundred ninety-one".