145787857 has 2 divisors, whose sum is σ = 145787858. Its totient is φ = 145787856.

The previous prime is 145787839. The next prime is 145787891. The reversal of 145787857 is 758787541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133425601 + 12362256 = 11551^2 + 3516^2 .

It is a cyclic number.

It is not a de Polignac number, because 145787857 - 2⁷ = 145787729 is a prime.

It is not a weakly prime, because it can be changed into another prime (145787897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72893928 + 72893929.

It is an arithmetic number, because the mean of its divisors is an integer number (72893929).

Almost surely, 2^145787857 is an apocalyptic number.

It is an amenable number.

145787857 is a deficient number, since it is larger than the sum of its proper divisors (1).

145787857 is an equidigital number, since it uses as much as digits as its factorization.

145787857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2195200, while the sum is 52.

The square root of 145787857 is about 12074.2642425947. The cubic root of 145787857 is about 526.3085808071.

The spelling of 145787857 in words is "one hundred forty-five million, seven hundred eighty-seven thousand, eight hundred fifty-seven".