31396901 has 4 divisors (see below), whose sum is σ = 31636704. Its totient is φ = 31157100.

The previous prime is 31396889. The next prime is 31396913. The reversal of 31396901 is 10969313.

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: 10969313 = 1579 ⋅6947.

It is an interprime number because it is at equal distance from previous prime (31396889) and next prime (31396913).

It is a cyclic number.

It is not a de Polignac number, because 31396901 - 2¹⁰ = 31395877 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 (31396921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119705 + ... + 119966.

It is an arithmetic number, because the mean of its divisors is an integer number (7909176).

Almost surely, 2^31396901 is an apocalyptic number.

It is an amenable number.

31396901 is a deficient number, since it is larger than the sum of its proper divisors (239803).

31396901 is a wasteful number, since it uses less digits than its factorization.

31396901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239802.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 31396901 is about 5603.2937634930. The cubic root of 31396901 is about 315.4730475442.

The spelling of 31396901 in words is "thirty-one million, three hundred ninety-six thousand, nine hundred one".