70449891 has 16 divisors (see below), whose sum is σ = 100237440. Its totient is φ = 43882560.

The previous prime is 70449881. The next prime is 70449893. The reversal of 70449891 is 19894407.

It is not a de Polignac number, because 70449891 - 2¹³ = 70441699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70449893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4305 + ... + 12626.

It is an arithmetic number, because the mean of its divisors is an integer number (6264840).

Almost surely, 2^70449891 is an apocalyptic number.

70449891 is a deficient number, since it is larger than the sum of its proper divisors (29787549).

70449891 is a wasteful number, since it uses less digits than its factorization.

70449891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17026.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 70449891 is about 8393.4433339363. The cubic root of 70449891 is about 413.0095638455.

The spelling of 70449891 in words is "seventy million, four hundred forty-nine thousand, eight hundred ninety-one".