31028947 has 2 divisors, whose sum is σ = 31028948. Its totient is φ = 31028946.

The previous prime is 31028897. The next prime is 31028951. The reversal of 31028947 is 74982013.

It is a strong prime.

It is an emirp because it is prime and its reverse (74982013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31028947 - 2⁷ = 31028819 is a prime.

It is not a weakly prime, because it can be changed into another prime (31028047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15514473 + 15514474.

It is an arithmetic number, because the mean of its divisors is an integer number (15514474).

Almost surely, 2^31028947 is an apocalyptic number.

31028947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31028947 is an equidigital number, since it uses as much as digits as its factorization.

31028947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 31028947 is about 5570.3632736115. The cubic root of 31028947 is about 314.2358128269.

The spelling of 31028947 in words is "thirty-one million, twenty-eight thousand, nine hundred forty-seven".