131869019 has 2 divisors, whose sum is σ = 131869020. Its totient is φ = 131869018.

The previous prime is 131868991. The next prime is 131869021. The reversal of 131869019 is 910968131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131869019 - 2¹² = 131864923 is a prime.

It is a super-2 number, since 2×131869019² = 34778876344044722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 131869021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131869039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65934509 + 65934510.

It is an arithmetic number, because the mean of its divisors is an integer number (65934510).

Almost surely, 2^131869019 is an apocalyptic number.

131869019 is a deficient number, since it is larger than the sum of its proper divisors (1).

131869019 is an equidigital number, since it uses as much as digits as its factorization.

131869019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 131869019 is about 11483.4236619573. The cubic root of 131869019 is about 508.9958699840.

The spelling of 131869019 in words is "one hundred thirty-one million, eight hundred sixty-nine thousand, nineteen".