1919238427 has 16 divisors (see below), whose sum is σ = 2072125440. Its totient is φ = 1772416800.

The previous prime is 1919238407. The next prime is 1919238523. The reversal of 1919238427 is 7248329191.

It is a happy number.

It is not a de Polignac number, because 1919238427 - 2¹⁹ = 1918714139 is a prime.

It is a super-2 number, since 2×1919238427² = 7366952279346868658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1919238407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325774 + ... + 331612.

It is an arithmetic number, because the mean of its divisors is an integer number (129507840).

Almost surely, 2^1919238427 is an apocalyptic number.

1919238427 is a deficient number, since it is larger than the sum of its proper divisors (152887013).

1919238427 is a wasteful number, since it uses less digits than its factorization.

1919238427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354.

The product of its digits is 217728, while the sum is 46.

The square root of 1919238427 is about 43809.1135153406. The cubic root of 1919238427 is about 1242.7286484005.

The spelling of 1919238427 in words is "one billion, nine hundred nineteen million, two hundred thirty-eight thousand, four hundred twenty-seven".