145712977 has 2 divisors, whose sum is σ = 145712978. Its totient is φ = 145712976.

The previous prime is 145712969. The next prime is 145712999. The reversal of 145712977 is 779217541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 23853456 = 11039^2 + 4884^2 .

It is an emirp because it is prime and its reverse (779217541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145712977 - 2³ = 145712969 is a prime.

It is not a weakly prime, because it can be changed into another prime (145712947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72856488 + 72856489.

It is an arithmetic number, because the mean of its divisors is an integer number (72856489).

Almost surely, 2^145712977 is an apocalyptic number.

It is an amenable number.

145712977 is a deficient number, since it is larger than the sum of its proper divisors (1).

145712977 is an equidigital number, since it uses as much as digits as its factorization.

145712977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 43.

The square root of 145712977 is about 12071.1630342730. The cubic root of 145712977 is about 526.2184573072.

It can be divided in two parts, 145712 and 977, that added together give a square (146689 = 383²).

The spelling of 145712977 in words is "one hundred forty-five million, seven hundred twelve thousand, nine hundred seventy-seven".