155693949 has 8 divisors (see below), whose sum is σ = 207759360. Its totient is φ = 103712256.

The previous prime is 155693947. The next prime is 155693977. The reversal of 155693949 is 949396551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155693949 - 2¹ = 155693947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155693947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16452 + ... + 24125.

It is an arithmetic number, because the mean of its divisors is an integer number (25969920).

Almost surely, 2^155693949 is an apocalyptic number.

It is an amenable number.

155693949 is a deficient number, since it is larger than the sum of its proper divisors (52065411).

155693949 is a wasteful number, since it uses less digits than its factorization.

155693949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41859.

The product of its digits is 1312200, while the sum is 51.

The square root of 155693949 is about 12477.7381363771. The cubic root of 155693949 is about 537.9689927911.

The spelling of 155693949 in words is "one hundred fifty-five million, six hundred ninety-three thousand, nine hundred forty-nine".