31677121 has 4 divisors (see below), whose sum is σ = 36202432. Its totient is φ = 27151812.

The previous prime is 31677119. The next prime is 31677157. The reversal of 31677121 is 12177613.

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.

It is a cyclic number.

It is not a de Polignac number, because 31677121 - 2¹ = 31677119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31677121.

It is not an unprimeable number, because it can be changed into a prime (31677101) 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, 2262645 + ... + 2262658.

It is an arithmetic number, because the mean of its divisors is an integer number (9050608).

Almost surely, 2^31677121 is an apocalyptic number.

It is an amenable number.

31677121 is a deficient number, since it is larger than the sum of its proper divisors (4525311).

31677121 is an equidigital number, since it uses as much as digits as its factorization.

31677121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525310.

The product of its digits is 1764, while the sum is 28.

The square root of 31677121 is about 5628.2431539513. The cubic root of 31677121 is about 316.4088103413.

The spelling of 31677121 in words is "thirty-one million, six hundred seventy-seven thousand, one hundred twenty-one".