130711781 has 4 divisors (see below), whose sum is σ = 132552864. Its totient is φ = 128870700.

The previous prime is 130711769. The next prime is 130711799. The reversal of 130711781 is 187117031.

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.

It is a cyclic number.

It is not a de Polignac number, because 130711781 - 2¹⁸ = 130449637 is a prime.

It is a super-2 number, since 2×130711781² = 34171139384383922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130711751) 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, 920435 + ... + 920576.

It is an arithmetic number, because the mean of its divisors is an integer number (33138216).

Almost surely, 2^130711781 is an apocalyptic number.

It is an amenable number.

130711781 is a deficient number, since it is larger than the sum of its proper divisors (1841083).

130711781 is an equidigital number, since it uses as much as digits as its factorization.

130711781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841082.

The product of its (nonzero) digits is 1176, while the sum is 29.

The square root of 130711781 is about 11432.9253037007. The cubic root of 130711781 is about 507.5025678727.

The spelling of 130711781 in words is "one hundred thirty million, seven hundred eleven thousand, seven hundred eighty-one".