70920236617 has 2 divisors, whose sum is σ = 70920236618. Its totient is φ = 70920236616.

The previous prime is 70920236593. The next prime is 70920236837. The reversal of 70920236617 is 71663202907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62130049081 + 8790187536 = 249259^2 + 93756^2 .

It is an emirp because it is prime and its reverse (71663202907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70920236617 - 2²⁷ = 70786018889 is a prime.

It is a super-2 number, since 2×70920236617² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70920236017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35460118308 + 35460118309.

It is an arithmetic number, because the mean of its divisors is an integer number (35460118309).

Almost surely, 2^70920236617 is an apocalyptic number.

It is an amenable number.

70920236617 is a deficient number, since it is larger than the sum of its proper divisors (1).

70920236617 is an equidigital number, since it uses as much as digits as its factorization.

70920236617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 70920236617 in words is "seventy billion, nine hundred twenty million, two hundred thirty-six thousand, six hundred seventeen".