1019135923 has 4 divisors (see below), whose sum is σ = 1097531008. Its totient is φ = 940740840.

The previous prime is 1019135891. The next prime is 1019135933. The reversal of 1019135923 is 3295319101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3295319101 = 1559 ⋅2113739.

It is not a de Polignac number, because 1019135923 - 2⁵ = 1019135891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1019135933) 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, 39197523 + ... + 39197548.

It is an arithmetic number, because the mean of its divisors is an integer number (274382752).

Almost surely, 2^1019135923 is an apocalyptic number.

1019135923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1019135923 is a deficient number, since it is larger than the sum of its proper divisors (78395085).

1019135923 is an equidigital number, since it uses as much as digits as its factorization.

1019135923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78395084.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 1019135923 is about 31923.9083290251. The cubic root of 1019135923 is about 1006.3383810441.

The spelling of 1019135923 in words is "one billion, nineteen million, one hundred thirty-five thousand, nine hundred twenty-three".