190400069 has 4 divisors (see below), whose sum is σ = 191397120. Its totient is φ = 189403020.

The previous prime is 190400057. The next prime is 190400099. The reversal of 190400069 is 960004091.

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, and also an emirpimes, since its reverse is a distinct semiprime: 960004091 = 101 ⋅9504991.

It is a cyclic number.

It is not a de Polignac number, because 190400069 - 2⁴ = 190400053 is a prime.

It is a super-2 number, since 2×190400069² = 72504372550409522, 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 (190400029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498239 + ... + 498620.

It is an arithmetic number, because the mean of its divisors is an integer number (47849280).

Almost surely, 2^190400069 is an apocalyptic number.

It is an amenable number.

190400069 is a deficient number, since it is larger than the sum of its proper divisors (997051).

190400069 is an equidigital number, since it uses as much as digits as its factorization.

190400069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997050.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 190400069 is about 13798.5531487906. The cubic root of 190400069 is about 575.2929259838.

The spelling of 190400069 in words is "one hundred ninety million, four hundred thousand, sixty-nine".