70873139 has 2 divisors, whose sum is σ = 70873140. Its totient is φ = 70873138.

The previous prime is 70873109. The next prime is 70873157. The reversal of 70873139 is 93137807.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70873139 - 2⁸ = 70872883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70873109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35436569 + 35436570.

It is an arithmetic number, because the mean of its divisors is an integer number (35436570).

Almost surely, 2^70873139 is an apocalyptic number.

70873139 is a deficient number, since it is larger than the sum of its proper divisors (1).

70873139 is an equidigital number, since it uses as much as digits as its factorization.

70873139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 70873139 is about 8418.6185921444. The cubic root of 70873139 is about 413.8350043035.

The spelling of 70873139 in words is "seventy million, eight hundred seventy-three thousand, one hundred thirty-nine".