70404391 has 2 divisors, whose sum is σ = 70404392. Its totient is φ = 70404390.

The previous prime is 70404359. The next prime is 70404419. The reversal of 70404391 is 19340407.

It is an a-pointer prime, because the next prime (70404419) can be obtained adding 70404391 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70404391 - 2⁵ = 70404359 is a prime.

It is equal to p_4140469 and since 70404391 and 4140469 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70404331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35202195 + 35202196.

It is an arithmetic number, because the mean of its divisors is an integer number (35202196).

Almost surely, 2^70404391 is an apocalyptic number.

70404391 is a deficient number, since it is larger than the sum of its proper divisors (1).

70404391 is an equidigital number, since it uses as much as digits as its factorization.

70404391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 70404391 is about 8390.7324471705. The cubic root of 70404391 is about 412.9206307427.

Adding to 70404391 its reverse (19340407), we get a palindrome (89744798).

The spelling of 70404391 in words is "seventy million, four hundred four thousand, three hundred ninety-one".