39781110097 has 4 divisors (see below), whose sum is σ = 39788258980. Its totient is φ = 39773961216.

The previous prime is 39781110043. The next prime is 39781110113. The reversal of 39781110097 is 79001118793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79001118793 = 191 ⋅413618423.

It can be written as a sum of positive squares in 2 ways, for example, as 11562485841 + 28218624256 = 107529^2 + 167984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39781110097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39781110197) 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, 3566088 + ... + 3577225.

It is an arithmetic number, because the mean of its divisors is an integer number (9947064745).

Almost surely, 2^39781110097 is an apocalyptic number.

It is an amenable number.

39781110097 is a deficient number, since it is larger than the sum of its proper divisors (7148883).

39781110097 is an equidigital number, since it uses as much as digits as its factorization.

39781110097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7148882.

The product of its (nonzero) digits is 95256, while the sum is 46.

It can be divided in two parts, 39781 and 110097, that added together give a triangular number (149878 = T₅₄₇).

The spelling of 39781110097 in words is "thirty-nine billion, seven hundred eighty-one million, one hundred ten thousand, ninety-seven".