70001999 has 4 divisors (see below), whose sum is σ = 72260160. Its totient is φ = 67743840.

The previous prime is 70001983. The next prime is 70002001. The reversal of 70001999 is 99910007.

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 70001999 - 2⁴ = 70001983 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 (70001959) 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, 1129034 + ... + 1129095.

It is an arithmetic number, because the mean of its divisors is an integer number (18065040).

Almost surely, 2^70001999 is an apocalyptic number.

70001999 is a deficient number, since it is larger than the sum of its proper divisors (2258161).

70001999 is a wasteful number, since it uses less digits than its factorization.

70001999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258160.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 70001999 is about 8366.7197275874. The cubic root of 70001999 is about 412.1324530146.

The spelling of 70001999 in words is "seventy million, one thousand, nine hundred ninety-nine".