31740079 has 4 divisors (see below), whose sum is σ = 36274384. Its totient is φ = 27205776.

The previous prime is 31740077. The next prime is 31740083. The reversal of 31740079 is 97004713.

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

It is a cyclic number.

It is not a de Polignac number, because 31740079 - 2¹ = 31740077 is a prime.

It is a super-2 number, since 2×31740079² = 2014865229852482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31740079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31740073) 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, 2267142 + ... + 2267155.

It is an arithmetic number, because the mean of its divisors is an integer number (9068596).

Almost surely, 2^31740079 is an apocalyptic number.

31740079 is a deficient number, since it is larger than the sum of its proper divisors (4534305).

31740079 is an equidigital number, since it uses as much as digits as its factorization.

31740079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534304.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 31740079 is about 5633.8334196176. The cubic root of 31740079 is about 316.6182915332.

The spelling of 31740079 in words is "thirty-one million, seven hundred forty thousand, seventy-nine".