70444981 has 2 divisors, whose sum is σ = 70444982. Its totient is φ = 70444980.

The previous prime is 70444961. The next prime is 70445017. The reversal of 70444981 is 18944407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70408881 + 36100 = 8391^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 70444981 - 2¹⁷ = 70313909 is a prime.

It is a super-2 number, since 2×70444981² = 9924990696180722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70444981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70444901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35222490 + 35222491.

It is an arithmetic number, because the mean of its divisors is an integer number (35222491).

Almost surely, 2^70444981 is an apocalyptic number.

It is an amenable number.

70444981 is a deficient number, since it is larger than the sum of its proper divisors (1).

70444981 is an equidigital number, since it uses as much as digits as its factorization.

70444981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 70444981 is about 8393.1508386303. The cubic root of 70444981 is about 412.9999687321. Note that the first 4 decimals are identical.

The spelling of 70444981 in words is "seventy million, four hundred forty-four thousand, nine hundred eighty-one".