191019429 has 12 divisors (see below), whose sum is σ = 292147596. Its totient is φ = 119855232.

The previous prime is 191019401. The next prime is 191019431. The reversal of 191019429 is 924910191.

It can be written as a sum of positive squares in 2 ways, for example, as 82901025 + 108118404 = 9105^2 + 10398^2 .

It is not a de Polignac number, because 191019429 - 2⁵ = 191019397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191019393 and 191019402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191019449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 624094 + ... + 624399.

It is an arithmetic number, because the mean of its divisors is an integer number (24345633).

Almost surely, 2^191019429 is an apocalyptic number.

It is an amenable number.

191019429 is a deficient number, since it is larger than the sum of its proper divisors (101128167).

191019429 is a wasteful number, since it uses less digits than its factorization.

191019429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248516 (or 1248513 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 191019429 is about 13820.9778597609. The cubic root of 191019429 is about 575.9160486010.

The spelling of 191019429 in words is "one hundred ninety-one million, nineteen thousand, four hundred twenty-nine".