1960135891 has 4 divisors (see below), whose sum is σ = 2240155312. Its totient is φ = 1680116472.

The previous prime is 1960135873. The next prime is 1960135927. The reversal of 1960135891 is 1985310691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1960135891 - 2⁷ = 1960135763 is a prime.

It is a super-2 number, since 2×1960135891² = 7684265422372727762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1960135811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140009700 + ... + 140009713.

It is an arithmetic number, because the mean of its divisors is an integer number (560038828).

Almost surely, 2^1960135891 is an apocalyptic number.

1960135891 is a deficient number, since it is larger than the sum of its proper divisors (280019421).

1960135891 is an equidigital number, since it uses as much as digits as its factorization.

1960135891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280019420.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 1960135891 is about 44273.4219481621. The cubic root of 1960135891 is about 1251.4938707157.

The spelling of 1960135891 in words is "one billion, nine hundred sixty million, one hundred thirty-five thousand, eight hundred ninety-one".