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131939711 = 2397432
BaseRepresentation
bin1111101110100…
…11110101111111
3100012021020020222
413313103311333
5232234032321
621031531555
73161316611
oct767236577
9305236228
10131939711
1168527292
1238229bbb
1321447647
1413746db1
15b8b33ab
hex7dd3d7f

131939711 has 6 divisors (see below), whose sum is σ = 132670320. Its totient is φ = 131210828.

The previous prime is 131939701. The next prime is 131939713. The reversal of 131939711 is 117939131.

It is not a de Polignac number, because 131939711 - 226 = 64830847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131939713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177206 + ... + 177948.

It is an arithmetic number, because the mean of its divisors is an integer number (22111720).

Almost surely, 2131939711 is an apocalyptic number.

131939711 is a deficient number, since it is larger than the sum of its proper divisors (730609).

131939711 is an frugal number, since it uses more digits than its factorization.

131939711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725 (or 982 counting only the distinct ones).

The product of its digits is 5103, while the sum is 35.

The square root of 131939711 is about 11486.5012514690. The cubic root of 131939711 is about 509.0868074625.

The spelling of 131939711 in words is "one hundred thirty-one million, nine hundred thirty-nine thousand, seven hundred eleven".

Divisors: 1 239 743 177577 552049 131939711