70443669 has 4 divisors (see below), whose sum is σ = 93924896. Its totient is φ = 46962444.

The previous prime is 70443623. The next prime is 70443673. The reversal of 70443669 is 96634407.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 70443669 - 2¹² = 70439573 is a prime.

It is a super-2 number, since 2×70443669² = 9924621004363122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70443679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11740609 + ... + 11740614.

It is an arithmetic number, because the mean of its divisors is an integer number (23481224).

Almost surely, 2^70443669 is an apocalyptic number.

It is an amenable number.

70443669 is a deficient number, since it is larger than the sum of its proper divisors (23481227).

70443669 is a wasteful number, since it uses less digits than its factorization.

70443669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23481226.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 70443669 is about 8393.0726792993. The cubic root of 70443669 is about 412.9974047485.

The spelling of 70443669 in words is "seventy million, four hundred forty-three thousand, six hundred sixty-nine".