39970987771 has 32 divisors (see below), whose sum is σ = 47983299840. Its totient is φ = 32815843200.

The previous prime is 39970987753. The next prime is 39970987807. The reversal of 39970987771 is 17778907993.

It is a cyclic number.

It is not a de Polignac number, because 39970987771 - 2⁷ = 39970987643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39970987697 and 39970987706.

It is not an unprimeable number, because it can be changed into a prime (39970987751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1768981 + ... + 1791433.

It is an arithmetic number, because the mean of its divisors is an integer number (1499478120).

Almost surely, 2^39970987771 is an apocalyptic number.

39970987771 is a deficient number, since it is larger than the sum of its proper divisors (8012312069).

39970987771 is a wasteful number, since it uses less digits than its factorization.

39970987771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22747.

The product of its (nonzero) digits is 42007896, while the sum is 67.

The spelling of 39970987771 in words is "thirty-nine billion, nine hundred seventy million, nine hundred eighty-seven thousand, seven hundred seventy-one".