972311 has 4 divisors (see below), whose sum is σ = 976272. Its totient is φ = 968352.

The previous prime is 972277. The next prime is 972313. The reversal of 972311 is 113279.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972311 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 (972313) 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, 1586 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (244068).

2⁹⁷²³¹¹ is an apocalyptic number.

972311 is a deficient number, since it is larger than the sum of its proper divisors (3961).

972311 is a wasteful number, since it uses less digits than its factorization.

972311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960.

The product of its digits is 378, while the sum is 23.

The square root of 972311 is about 986.0583147056. The cubic root of 972311 is about 99.0683811486.

It can be divided in two parts, 9723 and 11, that multiplied together give a triangular number (106953 = T₄₆₂).

The spelling of 972311 in words is "nine hundred seventy-two thousand, three hundred eleven".