31453989 has 8 divisors (see below), whose sum is σ = 47929920. Its totient is φ = 17973696.

The previous prime is 31453969. The next prime is 31453991. The reversal of 31453989 is 98935413.

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

It is not a de Polignac number, because 31453989 - 2⁵ = 31453957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31453989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31453909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748884 + ... + 748925.

It is an arithmetic number, because the mean of its divisors is an integer number (5991240).

Almost surely, 2^31453989 is an apocalyptic number.

It is an amenable number.

31453989 is a deficient number, since it is larger than the sum of its proper divisors (16475931).

31453989 is a wasteful number, since it uses less digits than its factorization.

31453989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497819.

The product of its digits is 116640, while the sum is 42.

The square root of 31453989 is about 5608.3855965866. The cubic root of 31453989 is about 315.6641366886.

The spelling of 31453989 in words is "thirty-one million, four hundred fifty-three thousand, nine hundred eighty-nine".