147787813 has 2 divisors, whose sum is σ = 147787814. Its totient is φ = 147787812.

The previous prime is 147787789. The next prime is 147787823. The reversal of 147787813 is 318787741.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146458404 + 1329409 = 12102^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 147787813 - 2²¹ = 145690661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147787823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73893906 + 73893907.

It is an arithmetic number, because the mean of its divisors is an integer number (73893907).

Almost surely, 2^147787813 is an apocalyptic number.

It is an amenable number.

147787813 is a deficient number, since it is larger than the sum of its proper divisors (1).

147787813 is an equidigital number, since it uses as much as digits as its factorization.

147787813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 46.

The square root of 147787813 is about 12156.8011006185. The cubic root of 147787813 is about 528.7043384124.

It can be divided in two parts, 147 and 787813, that multiplied together give a palindrome (115808511).

The spelling of 147787813 in words is "one hundred forty-seven million, seven hundred eighty-seven thousand, eight hundred thirteen".