31696901 has 8 divisors (see below), whose sum is σ = 32740344. Its totient is φ = 30663360.

The previous prime is 31696879. The next prime is 31696909. The reversal of 31696901 is 10969613.

It is a Cunningham number, because it is equal to 5630²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 348100 + 31348801 = 590^2 + 5599^2 .

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 31696901 - 2⁶ = 31696837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31696909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4331 + ... + 9063.

It is an arithmetic number, because the mean of its divisors is an integer number (4092543).

Almost surely, 2^31696901 is an apocalyptic number.

It is an amenable number.

31696901 is a deficient number, since it is larger than the sum of its proper divisors (1043443).

31696901 is a wasteful number, since it uses less digits than its factorization.

31696901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 31696901 is about 5630.0000888099. Note that the first 4 decimals coincide. The cubic root of 31696901 is about 316.4746545411.

The spelling of 31696901 in words is "thirty-one million, six hundred ninety-six thousand, nine hundred one".