11631971 has 8 divisors (see below), whose sum is σ = 13186320. Its totient is φ = 10171872.

The previous prime is 11631947. The next prime is 11631989. The reversal of 11631971 is 17913611.

11631971 = T₁₇₅ + T₁₇₆ + ... + T₄₂₁.

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 11631971 - 2¹⁰ = 11630947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11631911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23300 + ... + 23793.

It is an arithmetic number, because the mean of its divisors is an integer number (1648290).

Almost surely, 2^11631971 is an apocalyptic number.

11631971 is a deficient number, since it is larger than the sum of its proper divisors (1554349).

11631971 is a wasteful number, since it uses less digits than its factorization.

11631971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47125.

The product of its digits is 1134, while the sum is 29.

The square root of 11631971 is about 3410.5675480776. The cubic root of 11631971 is about 226.5780163230.

The spelling of 11631971 in words is "eleven million, six hundred thirty-one thousand, nine hundred seventy-one".