70640753 has 2 divisors, whose sum is σ = 70640754. Its totient is φ = 70640752.

The previous prime is 70640749. The next prime is 70640767. The reversal of 70640753 is 35704607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60730849 + 9909904 = 7793^2 + 3148^2 .

It is a cyclic number.

It is not a de Polignac number, because 70640753 - 2² = 70640749 is a prime.

It is a super-3 number, since 3×70640753³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (70640743) 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, 35320376 + 35320377.

It is an arithmetic number, because the mean of its divisors is an integer number (35320377).

Almost surely, 2^70640753 is an apocalyptic number.

It is an amenable number.

70640753 is a deficient number, since it is larger than the sum of its proper divisors (1).

70640753 is an equidigital number, since it uses as much as digits as its factorization.

70640753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 70640753 is about 8404.8053517021. The cubic root of 70640753 is about 413.3822010525.

The spelling of 70640753 in words is "seventy million, six hundred forty thousand, seven hundred fifty-three".