70724749 has 2 divisors, whose sum is σ = 70724750. Its totient is φ = 70724748.

The previous prime is 70724711. The next prime is 70724761. The reversal of 70724749 is 94742707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45292900 + 25431849 = 6730^2 + 5043^2 .

It is a cyclic number.

It is not a de Polignac number, because 70724749 - 2¹⁵ = 70691981 is a prime.

It is a super-2 number, since 2×70724749² = 10003980242226002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70724249) 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, 35362374 + 35362375.

It is an arithmetic number, because the mean of its divisors is an integer number (35362375).

Almost surely, 2^70724749 is an apocalyptic number.

It is an amenable number.

70724749 is a deficient number, since it is larger than the sum of its proper divisors (1).

70724749 is an equidigital number, since it uses as much as digits as its factorization.

70724749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 70724749 is about 8409.8007705296. The cubic root of 70724749 is about 413.5459813853.

The spelling of 70724749 in words is "seventy million, seven hundred twenty-four thousand, seven hundred forty-nine".