155346449 has 2 divisors, whose sum is σ = 155346450. Its totient is φ = 155346448.

The previous prime is 155346437. The next prime is 155346463. The reversal of 155346449 is 944643551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130416400 + 24930049 = 11420^2 + 4993^2 .

It is an emirp because it is prime and its reverse (944643551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155346449 - 2¹² = 155342353 is a prime.

It is not a weakly prime, because it can be changed into another prime (155346479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77673224 + 77673225.

It is an arithmetic number, because the mean of its divisors is an integer number (77673225).

Almost surely, 2^155346449 is an apocalyptic number.

It is an amenable number.

155346449 is a deficient number, since it is larger than the sum of its proper divisors (1).

155346449 is an equidigital number, since it uses as much as digits as its factorization.

155346449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 41.

The square root of 155346449 is about 12463.8055584962. The cubic root of 155346449 is about 537.5684559647.

The spelling of 155346449 in words is "one hundred fifty-five million, three hundred forty-six thousand, four hundred forty-nine".