71970947 has 2 divisors, whose sum is σ = 71970948. Its totient is φ = 71970946.

The previous prime is 71970881. The next prime is 71970967. The reversal of 71970947 is 74907917.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71970947 - 2¹⁰ = 71969923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71970898 and 71970907.

It is not a weakly prime, because it can be changed into another prime (71970967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35985473 + 35985474.

It is an arithmetic number, because the mean of its divisors is an integer number (35985474).

Almost surely, 2^71970947 is an apocalyptic number.

71970947 is a deficient number, since it is larger than the sum of its proper divisors (1).

71970947 is an equidigital number, since it uses as much as digits as its factorization.

71970947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 71970947 is about 8483.5692370605. The cubic root of 71970947 is about 415.9608009015.

The spelling of 71970947 in words is "seventy-one million, nine hundred seventy thousand, nine hundred forty-seven".