131121897 has 8 divisors (see below), whose sum is σ = 176087520. Its totient is φ = 86785440.

The previous prime is 131121883. The next prime is 131121929. The reversal of 131121897 is 798121131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131121897 - 2¹⁵ = 131089129 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (131121817) 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, 156804 + ... + 157637.

It is an arithmetic number, because the mean of its divisors is an integer number (22010940).

Almost surely, 2^131121897 is an apocalyptic number.

It is an amenable number.

131121897 is a deficient number, since it is larger than the sum of its proper divisors (44965623).

131121897 is a wasteful number, since it uses less digits than its factorization.

131121897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314583.

The product of its digits is 3024, while the sum is 33.

The square root of 131121897 is about 11450.8469992398. The cubic root of 131121897 is about 508.0327869078.

The spelling of 131121897 in words is "one hundred thirty-one million, one hundred twenty-one thousand, eight hundred ninety-seven".