155107973 has 4 divisors (see below), whose sum is σ = 160111488. Its totient is φ = 150104460.

The previous prime is 155107951. The next prime is 155107987. The reversal of 155107973 is 379701551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 379701551 = 4339 ⋅87509.

It is a cyclic number.

It is not a de Polignac number, because 155107973 - 2¹⁰ = 155106949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155107903) 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 3 ways as a sum of consecutive naturals, for example, 2501711 + ... + 2501772.

It is an arithmetic number, because the mean of its divisors is an integer number (40027872).

Almost surely, 2^155107973 is an apocalyptic number.

It is an amenable number.

155107973 is a deficient number, since it is larger than the sum of its proper divisors (5003515).

155107973 is an equidigital number, since it uses as much as digits as its factorization.

155107973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003514.

The product of its (nonzero) digits is 33075, while the sum is 38.

The square root of 155107973 is about 12454.2351431150. The cubic root of 155107973 is about 537.2932370772.

The spelling of 155107973 in words is "one hundred fifty-five million, one hundred seven thousand, nine hundred seventy-three".