155442673 has 2 divisors, whose sum is σ = 155442674. Its totient is φ = 155442672.

The previous prime is 155442659. The next prime is 155442689. The reversal of 155442673 is 376244551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94711824 + 60730849 = 9732^2 + 7793^2 .

It is a cyclic number.

It is not a de Polignac number, because 155442673 - 2⁵ = 155442641 is a prime.

It is not a weakly prime, because it can be changed into another prime (155442473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77721336 + 77721337.

It is an arithmetic number, because the mean of its divisors is an integer number (77721337).

Almost surely, 2^155442673 is an apocalyptic number.

It is an amenable number.

155442673 is a deficient number, since it is larger than the sum of its proper divisors (1).

155442673 is an equidigital number, since it uses as much as digits as its factorization.

155442673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 37.

The square root of 155442673 is about 12467.6650981649. The cubic root of 155442673 is about 537.6794258022.

The spelling of 155442673 in words is "one hundred fifty-five million, four hundred forty-two thousand, six hundred seventy-three".