71700649 has 2 divisors, whose sum is σ = 71700650. Its totient is φ = 71700648.

The previous prime is 71700641. The next prime is 71700667. The reversal of 71700649 is 94600717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57108249 + 14592400 = 7557^2 + 3820^2 .

It is a cyclic number.

It is not a de Polignac number, because 71700649 - 2³ = 71700641 is a prime.

It is not a weakly prime, because it can be changed into another prime (71700641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35850324 + 35850325.

It is an arithmetic number, because the mean of its divisors is an integer number (35850325).

Almost surely, 2^71700649 is an apocalyptic number.

It is an amenable number.

71700649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71700649 is an equidigital number, since it uses as much as digits as its factorization.

71700649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 71700649 is about 8467.6235745338. The cubic root of 71700649 is about 415.4394126409.

The spelling of 71700649 in words is "seventy-one million, seven hundred thousand, six hundred forty-nine".