131911963 has 2 divisors, whose sum is σ = 131911964. Its totient is φ = 131911962.

The previous prime is 131911943. The next prime is 131911991. The reversal of 131911963 is 369119131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131911963 is a prime.

It is not a weakly prime, because it can be changed into another prime (131911903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65955981 + 65955982.

It is an arithmetic number, because the mean of its divisors is an integer number (65955982).

Almost surely, 2^131911963 is an apocalyptic number.

131911963 is a deficient number, since it is larger than the sum of its proper divisors (1).

131911963 is an equidigital number, since it uses as much as digits as its factorization.

131911963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 34.

The square root of 131911963 is about 11485.2933353920. The cubic root of 131911963 is about 509.0511165877.

It can be divided in two parts, 131 and 911963, that multiplied together give a triangular number (119467153 = T₁₅₄₅₇).

The spelling of 131911963 in words is "one hundred thirty-one million, nine hundred eleven thousand, nine hundred sixty-three".