145869877 has 4 divisors (see below), whose sum is σ = 154450476. Its totient is φ = 137289280.

The previous prime is 145869869. The next prime is 145869881. The reversal of 145869877 is 778968541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99820081 + 46049796 = 9991^2 + 6786^2 .

It is not a de Polignac number, because 145869877 - 2³ = 145869869 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 (145869827) 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, 4290274 + ... + 4290307.

It is an arithmetic number, because the mean of its divisors is an integer number (38612619).

Almost surely, 2^145869877 is an apocalyptic number.

145869877 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

145869877 is a deficient number, since it is larger than the sum of its proper divisors (8580599).

145869877 is an equidigital number, since it uses as much as digits as its factorization.

145869877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580598.

The product of its digits is 3386880, while the sum is 55.

The square root of 145869877 is about 12077.6602452627. The cubic root of 145869877 is about 526.4072624070.

The spelling of 145869877 in words is "one hundred forty-five million, eight hundred sixty-nine thousand, eight hundred seventy-seven".