31428953 has 4 divisors (see below), whose sum is σ = 32512740. Its totient is φ = 30345168.

The previous prime is 31428923. The next prime is 31428959. The reversal of 31428953 is 35982413.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17530969 + 13897984 = 4187^2 + 3728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31428953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31428959) 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, 541850 + ... + 541907.

It is an arithmetic number, because the mean of its divisors is an integer number (8128185).

Almost surely, 2^31428953 is an apocalyptic number.

It is an amenable number.

31428953 is a deficient number, since it is larger than the sum of its proper divisors (1083787).

31428953 is a wasteful number, since it uses less digits than its factorization.

31428953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083786.

The product of its digits is 25920, while the sum is 35.

The square root of 31428953 is about 5606.1531374018. The cubic root of 31428953 is about 315.5803628409.

The spelling of 31428953 in words is "thirty-one million, four hundred twenty-eight thousand, nine hundred fifty-three".