155323799 has 2 divisors, whose sum is σ = 155323800. Its totient is φ = 155323798.

The previous prime is 155323757. The next prime is 155323823. The reversal of 155323799 is 997323551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155323799 - 2²⁰ = 154275223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155320799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77661899 + 77661900.

It is an arithmetic number, because the mean of its divisors is an integer number (77661900).

Almost surely, 2^155323799 is an apocalyptic number.

155323799 is a deficient number, since it is larger than the sum of its proper divisors (1).

155323799 is an equidigital number, since it uses as much as digits as its factorization.

155323799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 255150, while the sum is 44.

The square root of 155323799 is about 12462.8968943821. The cubic root of 155323799 is about 537.5423283053.

It can be divided in two parts, 1553 and 23799, that added together give a palindrome (25352).

The spelling of 155323799 in words is "one hundred fifty-five million, three hundred twenty-three thousand, seven hundred ninety-nine".