155011393 has 2 divisors, whose sum is σ = 155011394. Its totient is φ = 155011392.

The previous prime is 155011391. The next prime is 155011397. The reversal of 155011393 is 393110551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85988529 + 69022864 = 9273^2 + 8308^2 .

It is a cyclic number.

It is not a de Polignac number, because 155011393 - 2¹ = 155011391 is a prime.

Together with 155011391, it forms a pair of twin primes.

It is equal to p_8710147 and since 155011393 and 8710147 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (155011391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77505696 + 77505697.

It is an arithmetic number, because the mean of its divisors is an integer number (77505697).

Almost surely, 2^155011393 is an apocalyptic number.

It is an amenable number.

155011393 is a deficient number, since it is larger than the sum of its proper divisors (1).

155011393 is an equidigital number, since it uses as much as digits as its factorization.

155011393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025, while the sum is 28.

The square root of 155011393 is about 12450.3571434718. The cubic root of 155011393 is about 537.1816963788.

The spelling of 155011393 in words is "one hundred fifty-five million, eleven thousand, three hundred ninety-three".