155194733 has 2 divisors, whose sum is σ = 155194734. Its totient is φ = 155194732.

The previous prime is 155194703. The next prime is 155194757. The reversal of 155194733 is 337491551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93760489 + 61434244 = 9683^2 + 7838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155194733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155194703) 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, 77597366 + 77597367.

It is an arithmetic number, because the mean of its divisors is an integer number (77597367).

Almost surely, 2^155194733 is an apocalyptic number.

It is an amenable number.

155194733 is a deficient number, since it is larger than the sum of its proper divisors (1).

155194733 is an equidigital number, since it uses as much as digits as its factorization.

155194733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 155194733 is about 12457.7178086518. The cubic root of 155194733 is about 537.3933971389.

The spelling of 155194733 in words is "one hundred fifty-five million, one hundred ninety-four thousand, seven hundred thirty-three".