70308919 has 2 divisors, whose sum is σ = 70308920. Its totient is φ = 70308918.

The previous prime is 70308893. The next prime is 70308941. The reversal of 70308919 is 91980307.

It is a strong prime.

It is an emirp because it is prime and its reverse (91980307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70308919 - 2¹¹ = 70306871 is a prime.

It is a super-2 number, since 2×70308919² = 9886688181897122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70308419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35154459 + 35154460.

It is an arithmetic number, because the mean of its divisors is an integer number (35154460).

Almost surely, 2^70308919 is an apocalyptic number.

70308919 is a deficient number, since it is larger than the sum of its proper divisors (1).

70308919 is an equidigital number, since it uses as much as digits as its factorization.

70308919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 70308919 is about 8385.0413833207. The cubic root of 70308919 is about 412.7338990587.

The spelling of 70308919 in words is "seventy million, three hundred eight thousand, nine hundred nineteen".