31439354 has 4 divisors (see below), whose sum is σ = 47159034. Its totient is φ = 15719676.

The previous prime is 31439351. The next prime is 31439371. The reversal of 31439354 is 45393413.

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

It can be written as a sum of positive squares in only one way, i.e., 27931225 + 3508129 = 5285^2 + 1873^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31439354.

It is not an unprimeable number, because it can be changed into a prime (31439351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7859837 + ... + 7859840.

Almost surely, 2^31439354 is an apocalyptic number.

31439354 is a deficient number, since it is larger than the sum of its proper divisors (15719680).

31439354 is a wasteful number, since it uses less digits than its factorization.

31439354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15719679.

The product of its digits is 19440, while the sum is 32.

The square root of 31439354 is about 5607.0807021123. The cubic root of 31439354 is about 315.6151713961.

The spelling of 31439354 in words is "thirty-one million, four hundred thirty-nine thousand, three hundred fifty-four".