31948643 has 4 divisors (see below), whose sum is σ = 32258928. Its totient is φ = 31638360.

The previous prime is 31948639. The next prime is 31948667. The reversal of 31948643 is 34684913.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31948643 - 2² = 31948639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31948597 and 31948606.

It is not an unprimeable number, because it can be changed into a prime (31948043) 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, 154988 + ... + 155193.

It is an arithmetic number, because the mean of its divisors is an integer number (8064732).

Almost surely, 2^31948643 is an apocalyptic number.

31948643 is a deficient number, since it is larger than the sum of its proper divisors (310285).

31948643 is a wasteful number, since it uses less digits than its factorization.

31948643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310284.

The product of its digits is 62208, while the sum is 38.

The square root of 31948643 is about 5652.3130663473. The cubic root of 31948643 is about 317.3102774611.

The spelling of 31948643 in words is "thirty-one million, nine hundred forty-eight thousand, six hundred forty-three".