70398491 has 2 divisors, whose sum is σ = 70398492. Its totient is φ = 70398490.

The previous prime is 70398481. The next prime is 70398509. The reversal of 70398491 is 19489307.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70398491 is a prime.

It is not a weakly prime, because it can be changed into another prime (70398451) 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, 35199245 + 35199246.

It is an arithmetic number, because the mean of its divisors is an integer number (35199246).

Almost surely, 2^70398491 is an apocalyptic number.

70398491 is a deficient number, since it is larger than the sum of its proper divisors (1).

70398491 is an equidigital number, since it uses as much as digits as its factorization.

70398491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 70398491 is about 8390.3808614389. The cubic root of 70398491 is about 412.9090959518.

The spelling of 70398491 in words is "seventy million, three hundred ninety-eight thousand, four hundred ninety-one".