70724761 has 2 divisors, whose sum is σ = 70724762. Its totient is φ = 70724760.

The previous prime is 70724749. The next prime is 70724791. The reversal of 70724761 is 16742707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 27625536 = 6565^2 + 5256^2 .

It is a cyclic number.

It is not a de Polignac number, because 70724761 - 2⁹ = 70724249 is a prime.

It is not a weakly prime, because it can be changed into another prime (70724711) 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 as a sum of consecutive naturals, namely, 35362380 + 35362381.

It is an arithmetic number, because the mean of its divisors is an integer number (35362381).

Almost surely, 2^70724761 is an apocalyptic number.

It is an amenable number.

70724761 is a deficient number, since it is larger than the sum of its proper divisors (1).

70724761 is an equidigital number, since it uses as much as digits as its factorization.

70724761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 70724761 is about 8409.8014839828. The cubic root of 70724761 is about 413.5460047743.

The spelling of 70724761 in words is "seventy million, seven hundred twenty-four thousand, seven hundred sixty-one".