31747290641 has 4 divisors (see below), whose sum is σ = 34633407984. Its totient is φ = 28861173300.

The previous prime is 31747290587. The next prime is 31747290649. The reversal of 31747290641 is 14609274713.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14609274713 = 11 ⋅1328115883.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31747290641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31747290592 and 31747290601.

It is not an unprimeable number, because it can be changed into a prime (31747290649) 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, 1443058655 + ... + 1443058676.

It is an arithmetic number, because the mean of its divisors is an integer number (8658351996).

Almost surely, 2^31747290641 is an apocalyptic number.

It is an amenable number.

31747290641 is a deficient number, since it is larger than the sum of its proper divisors (2886117343).

31747290641 is a wasteful number, since it uses less digits than its factorization.

31747290641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886117342.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 31747290641 in words is "thirty-one billion, seven hundred forty-seven million, two hundred ninety thousand, six hundred forty-one".