31236073897 has 8 divisors (see below), whose sum is σ = 36849930752. Its totient is φ = 25910107200.

The previous prime is 31236073831. The next prime is 31236073903. The reversal of 31236073897 is 79837063213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31236073897 - 2¹¹ = 31236071849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31236073897.

It is not an unprimeable number, because it can be changed into a prime (31236073097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71972304 + ... + 71972737.

It is an arithmetic number, because the mean of its divisors is an integer number (4606241344).

Almost surely, 2^31236073897 is an apocalyptic number.

It is an amenable number.

31236073897 is a deficient number, since it is larger than the sum of its proper divisors (5613856855).

31236073897 is a wasteful number, since it uses less digits than its factorization.

31236073897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143945079.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 31236073897 in words is "thirty-one billion, two hundred thirty-six million, seventy-three thousand, eight hundred ninety-seven".