190070381 has 4 divisors (see below), whose sum is σ = 190257564. Its totient is φ = 189883200.

The previous prime is 190070341. The next prime is 190070399. The reversal of 190070381 is 183070091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183070091 = 2459 ⋅74449.

It can be written as a sum of positive squares in 2 ways, for example, as 161544100 + 28526281 = 12710^2 + 5341^2 .

It is a cyclic number.

It is not a de Polignac number, because 190070381 - 2⁶ = 190070317 is a prime.

It is a super-2 number, since 2×190070381² = 72253499466970322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190070341) 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, 92060 + ... + 94101.

It is an arithmetic number, because the mean of its divisors is an integer number (47564391).

Almost surely, 2^190070381 is an apocalyptic number.

It is an amenable number.

190070381 is a deficient number, since it is larger than the sum of its proper divisors (187183).

190070381 is a wasteful number, since it uses less digits than its factorization.

190070381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187182.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 190070381 is about 13786.6015029085. The cubic root of 190070381 is about 574.9606838902.

The spelling of 190070381 in words is "one hundred ninety million, seventy thousand, three hundred eighty-one".