40897686973 has 18 divisors (see below), whose sum is σ = 48421125662. Its totient is φ = 34313006640.

The previous prime is 40897686961. The next prime is 40897687021. The reversal of 40897686973 is 37968679804.

It can be written as a sum of positive squares in only one way, i.e., 28313783289 + 12583903684 = 168267^2 + 112178^2 .

It is not a de Polignac number, because 40897686973 - 2⁹ = 40897686461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40897686899 and 40897686908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40897686953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8018178 + ... + 8023276.

Almost surely, 2^40897686973 is an apocalyptic number.

It is an amenable number.

40897686973 is a deficient number, since it is larger than the sum of its proper divisors (7523438689).

40897686973 is an frugal number, since it uses more digits than its factorization.

40897686973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10233 (or 5123 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 40897686973 in words is "forty billion, eight hundred ninety-seven million, six hundred eighty-six thousand, nine hundred seventy-three".