70351291 has 2 divisors, whose sum is σ = 70351292. Its totient is φ = 70351290.

The previous prime is 70351283. The next prime is 70351297. The reversal of 70351291 is 19215307.

It is a strong prime.

It is an emirp because it is prime and its reverse (19215307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70351291 - 2³ = 70351283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70351297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35175645 + 35175646.

It is an arithmetic number, because the mean of its divisors is an integer number (35175646).

Almost surely, 2^70351291 is an apocalyptic number.

70351291 is a deficient number, since it is larger than the sum of its proper divisors (1).

70351291 is an equidigital number, since it uses as much as digits as its factorization.

70351291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 70351291 is about 8387.5676450327. The cubic root of 70351291 is about 412.8167944156.

Adding to 70351291 its reverse (19215307), we get a palindrome (89566598).

The spelling of 70351291 in words is "seventy million, three hundred fifty-one thousand, two hundred ninety-one".