39791497 has 4 divisors (see below), whose sum is σ = 40336660. Its totient is φ = 39246336.

The previous prime is 39791489. The next prime is 39791503. The reversal of 39791497 is 79419793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79419793 = 1153 ⋅68881.

It can be written as a sum of positive squares in 2 ways, for example, as 15397776 + 24393721 = 3924^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 39791497 - 2³ = 39791489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39791497.

It is not an unprimeable number, because it can be changed into a prime (39791417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272472 + ... + 272617.

It is an arithmetic number, because the mean of its divisors is an integer number (10084165).

Almost surely, 2^39791497 is an apocalyptic number.

It is an amenable number.

39791497 is a deficient number, since it is larger than the sum of its proper divisors (545163).

39791497 is an equidigital number, since it uses as much as digits as its factorization.

39791497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545162.

The product of its digits is 428652, while the sum is 49.

The square root of 39791497 is about 6308.0501741822. The cubic root of 39791497 is about 341.3999286625.

It can be divided in two parts, 3979 and 1497, that added together give a square (5476 = 74²).

The spelling of 39791497 in words is "thirty-nine million, seven hundred ninety-one thousand, four hundred ninety-seven".