131213477 has 2 divisors, whose sum is σ = 131213478. Its totient is φ = 131213476.

The previous prime is 131213473. The next prime is 131213561. The reversal of 131213477 is 774312131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105801796 + 25411681 = 10286^2 + 5041^2 .

It is a cyclic number.

It is not a de Polignac number, because 131213477 - 2² = 131213473 is a prime.

It is equal to p_7443137 and since 131213477 and 7443137 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131213473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606738 + 65606739.

It is an arithmetic number, because the mean of its divisors is an integer number (65606739).

Almost surely, 2^131213477 is an apocalyptic number.

It is an amenable number.

131213477 is a deficient number, since it is larger than the sum of its proper divisors (1).

131213477 is an equidigital number, since it uses as much as digits as its factorization.

131213477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 131213477 is about 11454.8451320828. The cubic root of 131213477 is about 508.1510351846.

The spelling of 131213477 in words is "one hundred thirty-one million, two hundred thirteen thousand, four hundred seventy-seven".