70000381 has 4 divisors (see below), whose sum is σ = 76364064. Its totient is φ = 63636700.

The previous prime is 70000379. The next prime is 70000409. The reversal of 70000381 is 18300007.

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 a cyclic number.

It is not a de Polignac number, because 70000381 - 2¹ = 70000379 is a prime.

It is a super-2 number, since 2×70000381² = 9800106680290322, 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 (70000331) 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, 3181825 + ... + 3181846.

It is an arithmetic number, because the mean of its divisors is an integer number (19091016).

Almost surely, 2^70000381 is an apocalyptic number.

It is an amenable number.

70000381 is a deficient number, since it is larger than the sum of its proper divisors (6363683).

70000381 is a wasteful number, since it uses less digits than its factorization.

70000381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363682.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 70000381 is about 8366.6230344148. The cubic root of 70000381 is about 412.1292776984.

Adding to 70000381 its reverse (18300007), we get a palindrome (88300388).

The spelling of 70000381 in words is "seventy million, three hundred eighty-one", and thus it is an aban number.