39960917834 has 4 divisors (see below), whose sum is σ = 59941376754. Its totient is φ = 19980458916.

The previous prime is 39960917831. The next prime is 39960917839. The reversal of 39960917834 is 43871906993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43871906993 = 71 ⋅617914183.

It can be written as a sum of positive squares in only one way, i.e., 31607506225 + 8353411609 = 177785^2 + 91397^2 .

It is not an unprimeable number, because it can be changed into a prime (39960917831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9990229457 + ... + 9990229460.

Almost surely, 2^39960917834 is an apocalyptic number.

39960917834 is a deficient number, since it is larger than the sum of its proper divisors (19980458920).

39960917834 is a wasteful number, since it uses less digits than its factorization.

39960917834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19980458919.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 39960917834 in words is "thirty-nine billion, nine hundred sixty million, nine hundred seventeen thousand, eight hundred thirty-four".