131377443 has 16 divisors (see below), whose sum is σ = 178747296. Its totient is φ = 85812480.

The previous prime is 131377429. The next prime is 131377501. The reversal of 131377443 is 344773131.

It is a Cunningham number, because it is equal to 11462²-1.

It is not a de Polignac number, because 131377443 - 2¹⁴ = 131361059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131377423) 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, 32473 + ... + 36293.

It is an arithmetic number, because the mean of its divisors is an integer number (11171706).

Almost surely, 2^131377443 is an apocalyptic number.

131377443 is a deficient number, since it is larger than the sum of its proper divisors (47369853).

131377443 is a wasteful number, since it uses less digits than its factorization.

131377443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054.

The product of its digits is 21168, while the sum is 33.

The square root of 131377443 is about 11461.9999563776. Note that the first 4 decimals coincide. The cubic root of 131377443 is about 508.3626110403.

The spelling of 131377443 in words is "one hundred thirty-one million, three hundred seventy-seven thousand, four hundred forty-three".