131378662 has 4 divisors (see below), whose sum is σ = 197067996. Its totient is φ = 65689330.

The previous prime is 131378641. The next prime is 131378693. The reversal of 131378662 is 266873131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 266873131 = 7 ⋅38124733.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32844664 + ... + 32844667.

It is an arithmetic number, because the mean of its divisors is an integer number (49266999).

Almost surely, 2^131378662 is an apocalyptic number.

131378662 is a deficient number, since it is larger than the sum of its proper divisors (65689334).

131378662 is an equidigital number, since it uses as much as digits as its factorization.

131378662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65689333.

The product of its digits is 36288, while the sum is 37.

The square root of 131378662 is about 11462.0531319655. The cubic root of 131378662 is about 508.3641833348.

The spelling of 131378662 in words is "one hundred thirty-one million, three hundred seventy-eight thousand, six hundred sixty-two".