161628479 has 2 divisors, whose sum is σ = 161628480. Its totient is φ = 161628478.

The previous prime is 161628461. The next prime is 161628557. The reversal of 161628479 is 974826161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161628479 - 2¹² = 161624383 is a prime.

It is a super-3 number, since 3×161628479³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161628409) 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, 80814239 + 80814240.

It is an arithmetic number, because the mean of its divisors is an integer number (80814240).

Almost surely, 2^161628479 is an apocalyptic number.

161628479 is a deficient number, since it is larger than the sum of its proper divisors (1).

161628479 is an equidigital number, since it uses as much as digits as its factorization.

161628479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 161628479 is about 12713.3189608379. The cubic root of 161628479 is about 544.7191314330.

It can be divided in two parts, 1616 and 28479, that multiplied together give a palindrome (46022064).

The spelling of 161628479 in words is "one hundred sixty-one million, six hundred twenty-eight thousand, four hundred seventy-nine".