70442749 has 6 divisors (see below), whose sum is σ = 76278426. Its totient is φ = 65023920.

The previous prime is 70442719. The next prime is 70442791. The reversal of 70442749 is 94724407.

It can be written as a sum of positive squares in 3 ways, for example, as 7128900 + 63313849 = 2670^2 + 7957^2 .

It is not a de Polignac number, because 70442749 - 2¹³ = 70434557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70442719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208242 + ... + 208579.

It is an arithmetic number, because the mean of its divisors is an integer number (12713071).

Almost surely, 2^70442749 is an apocalyptic number.

It is an amenable number.

70442749 is a deficient number, since it is larger than the sum of its proper divisors (5835677).

70442749 is a wasteful number, since it uses less digits than its factorization.

70442749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416847 (or 416834 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 70442749 is about 8393.0178720172. The cubic root of 70442749 is about 412.9956068142.

The spelling of 70442749 in words is "seventy million, four hundred forty-two thousand, seven hundred forty-nine".