39071397491 has 12 divisors (see below), whose sum is σ = 46916544960. Its totient is φ = 32409452880.

The previous prime is 39071397481. The next prime is 39071397509. The reversal of 39071397491 is 19479317093.

39071397491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39071397491 - 2¹⁰ = 39071396467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39071397461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12859376 + ... + 12862413.

It is an arithmetic number, because the mean of its divisors is an integer number (3909712080).

Almost surely, 2^39071397491 is an apocalyptic number.

39071397491 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

39071397491 is a deficient number, since it is larger than the sum of its proper divisors (7845147469).

39071397491 is a wasteful number, since it uses less digits than its factorization.

39071397491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25721834 (or 25721827 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 39071397491 in words is "thirty-nine billion, seventy-one million, three hundred ninety-seven thousand, four hundred ninety-one".