70889431 has 2 divisors, whose sum is σ = 70889432. Its totient is φ = 70889430.

The previous prime is 70889419. The next prime is 70889477. The reversal of 70889431 is 13498807.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70889431 - 2⁹ = 70888919 is a prime.

It is a super-2 number, since 2×70889431² = 10050622855007522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70889411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35444715 + 35444716.

It is an arithmetic number, because the mean of its divisors is an integer number (35444716).

Almost surely, 2^70889431 is an apocalyptic number.

70889431 is a deficient number, since it is larger than the sum of its proper divisors (1).

70889431 is an equidigital number, since it uses as much as digits as its factorization.

70889431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 70889431 is about 8419.5861537251. The cubic root of 70889431 is about 413.8667120536.

The spelling of 70889431 in words is "seventy million, eight hundred eighty-nine thousand, four hundred thirty-one".