70729873 has 2 divisors, whose sum is σ = 70729874. Its totient is φ = 70729872.

The previous prime is 70729871. The next prime is 70729921. The reversal of 70729873 is 37892707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46009089 + 24720784 = 6783^2 + 4972^2 .

It is a cyclic number.

It is not a de Polignac number, because 70729873 - 2¹ = 70729871 is a prime.

It is a super-2 number, since 2×70729873² = 10005429869192258, which contains 22 as substring.

Together with 70729871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (70729871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35364936 + 35364937.

It is an arithmetic number, because the mean of its divisors is an integer number (35364937).

Almost surely, 2^70729873 is an apocalyptic number.

It is an amenable number.

70729873 is a deficient number, since it is larger than the sum of its proper divisors (1).

70729873 is an equidigital number, since it uses as much as digits as its factorization.

70729873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 70729873 is about 8410.1054095653. The cubic root of 70729873 is about 413.5559682638. Note that the first 3 decimals are identical.

The spelling of 70729873 in words is "seventy million, seven hundred twenty-nine thousand, eight hundred seventy-three".