70399943 has 4 divisors (see below), whose sum is σ = 70572480. Its totient is φ = 70227408.

The previous prime is 70399933. The next prime is 70399957. The reversal of 70399943 is 34999307.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70399943 - 2¹⁸ = 70137799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70399894 and 70399903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70399913) 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, 85655 + ... + 86472.

It is an arithmetic number, because the mean of its divisors is an integer number (17643120).

Almost surely, 2^70399943 is an apocalyptic number.

70399943 is a deficient number, since it is larger than the sum of its proper divisors (172537).

70399943 is a wasteful number, since it uses less digits than its factorization.

70399943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172536.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 70399943 is about 8390.4673886501. The cubic root of 70399943 is about 412.9119347432.

The spelling of 70399943 in words is "seventy million, three hundred ninety-nine thousand, nine hundred forty-three".