16155397 has 2 divisors, whose sum is σ = 16155398. Its totient is φ = 16155396.

The previous prime is 16155367. The next prime is 16155409. The reversal of 16155397 is 79355161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12773476 + 3381921 = 3574^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 16155397 - 2¹⁵ = 16122629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16155317) 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, 8077698 + 8077699.

It is an arithmetic number, because the mean of its divisors is an integer number (8077699).

Almost surely, 2^16155397 is an apocalyptic number.

It is an amenable number.

16155397 is a deficient number, since it is larger than the sum of its proper divisors (1).

16155397 is an equidigital number, since it uses as much as digits as its factorization.

16155397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 37.

The square root of 16155397 is about 4019.3776881502. The cubic root of 16155397 is about 252.7973662216.

The spelling of 16155397 in words is "sixteen million, one hundred fifty-five thousand, three hundred ninety-seven".