39742091 has 16 divisors (see below), whose sum is σ = 43968000. Its totient is φ = 35754048.

The previous prime is 39742081. The next prime is 39742097. The reversal of 39742091 is 19024793.

It is not a de Polignac number, because 39742091 - 2¹⁰ = 39741067 is a prime.

It is a super-4 number, since 4×39742091⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39742097) 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, 86735 + ... + 87191.

It is an arithmetic number, because the mean of its divisors is an integer number (2748000).

Almost surely, 2^39742091 is an apocalyptic number.

39742091 is a deficient number, since it is larger than the sum of its proper divisors (4225909).

39742091 is a wasteful number, since it uses less digits than its factorization.

39742091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 39742091 is about 6304.1328507575. The cubic root of 39742091 is about 341.2585735836.

The spelling of 39742091 in words is "thirty-nine million, seven hundred forty-two thousand, ninety-one".