151778873 has 4 divisors (see below), whose sum is σ = 160707060. Its totient is φ = 142850688.

The previous prime is 151778819. The next prime is 151778959. The reversal of 151778873 is 378877151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378877151 = 37 ⋅10239923.

It can be written as a sum of positive squares in 2 ways, for example, as 142730809 + 9048064 = 11947^2 + 3008^2 .

It is a cyclic number.

It is not a de Polignac number, because 151778873 - 2¹⁶ = 151713337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151774873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4464068 + ... + 4464101.

It is an arithmetic number, because the mean of its divisors is an integer number (40176765).

Almost surely, 2^151778873 is an apocalyptic number.

It is an amenable number.

151778873 is a deficient number, since it is larger than the sum of its proper divisors (8928187).

151778873 is an equidigital number, since it uses as much as digits as its factorization.

151778873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8928186.

The product of its digits is 329280, while the sum is 47.

The square root of 151778873 is about 12319.8568579347. The cubic root of 151778873 is about 533.4214078070.

The spelling of 151778873 in words is "one hundred fifty-one million, seven hundred seventy-eight thousand, eight hundred seventy-three".