147321631 has 2 divisors, whose sum is σ = 147321632. Its totient is φ = 147321630.

The previous prime is 147321617. The next prime is 147321637. The reversal of 147321631 is 136123741.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 147321631 - 2⁵ = 147321599 is a prime.

It is a super-2 number, since 2×147321631² = 43407325921000322, which contains 22 as substring.

It is equal to p_8302168 and since 147321631 and 8302168 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 147321631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147321637) by changing a digit.

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, 73660815 + 73660816.

It is an arithmetic number, because the mean of its divisors is an integer number (73660816).

Almost surely, 2^147321631 is an apocalyptic number.

147321631 is the 7677-th centered pentagonal number.

147321631 is a deficient number, since it is larger than the sum of its proper divisors (1).

147321631 is an equidigital number, since it uses as much as digits as its factorization.

147321631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 147321631 is about 12137.6122445891. The cubic root of 147321631 is about 528.1478377249.

It can be divided in two parts, 1473 and 21631, that added together give a square (23104 = 152²).

The spelling of 147321631 in words is "one hundred forty-seven million, three hundred twenty-one thousand, six hundred thirty-one".