155400973 has 16 divisors (see below), whose sum is σ = 193029760. Its totient is φ = 121818816.

The previous prime is 155400919. The next prime is 155400997. The reversal of 155400973 is 379004551.

It is not a de Polignac number, because 155400973 - 2²⁵ = 121846541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155400913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2086 + ... + 17752.

It is an arithmetic number, because the mean of its divisors is an integer number (12064360).

Almost surely, 2^155400973 is an apocalyptic number.

155400973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155400973 is a deficient number, since it is larger than the sum of its proper divisors (37628787).

155400973 is a wasteful number, since it uses less digits than its factorization.

155400973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15796.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 155400973 is about 12465.9926600331. The cubic root of 155400973 is about 537.6313411142.

The spelling of 155400973 in words is "one hundred fifty-five million, four hundred thousand, nine hundred seventy-three".