155361939 has 8 divisors (see below), whose sum is σ = 208731072. Its totient is φ = 102783720.

The previous prime is 155361901. The next prime is 155361959. The reversal of 155361939 is 939163551.

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

It is not a de Polignac number, because 155361939 - 2¹¹ = 155359891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155361939.

It is not an unprimeable number, because it can be changed into a prime (155361959) 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 in 7 ways as a sum of consecutive naturals, for example, 197269 + ... + 198054.

It is an arithmetic number, because the mean of its divisors is an integer number (26091384).

Almost surely, 2^155361939 is an apocalyptic number.

155361939 is a deficient number, since it is larger than the sum of its proper divisors (53369133).

155361939 is a wasteful number, since it uses less digits than its factorization.

155361939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395457.

The product of its digits is 109350, while the sum is 42.

The square root of 155361939 is about 12464.4269423026. The cubic root of 155361939 is about 537.5863228223.

The spelling of 155361939 in words is "one hundred fifty-five million, three hundred sixty-one thousand, nine hundred thirty-nine".