31474749 has 8 divisors (see below), whose sum is σ = 42026080. Its totient is φ = 20953296.

The previous prime is 31474747. The next prime is 31474763. The reversal of 31474749 is 94747413.

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

It is not a de Polignac number, because 31474749 - 2¹ = 31474747 is a prime.

It is a super-2 number, since 2×31474749² = 1981319649226002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31474747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4882 + ... + 9315.

It is an arithmetic number, because the mean of its divisors is an integer number (5253260).

Almost surely, 2^31474749 is an apocalyptic number.

It is an amenable number.

31474749 is a deficient number, since it is larger than the sum of its proper divisors (10551331).

31474749 is a wasteful number, since it uses less digits than its factorization.

31474749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14939.

The product of its digits is 84672, while the sum is 39.

The square root of 31474749 is about 5610.2360912889. The cubic root of 31474749 is about 315.7335687542.

It can be divided in two parts, 31474 and 749, that added together give a palindrome (32223).

The spelling of 31474749 in words is "thirty-one million, four hundred seventy-four thousand, seven hundred forty-nine".