145172387 has 2 divisors, whose sum is σ = 145172388. Its totient is φ = 145172386.

The previous prime is 145172371. The next prime is 145172393. The reversal of 145172387 is 783271541.

145172387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145172387 - 2⁴ = 145172371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145172387.

It is not a weakly prime, because it can be changed into another prime (145172327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72586193 + 72586194.

It is an arithmetic number, because the mean of its divisors is an integer number (72586194).

Almost surely, 2^145172387 is an apocalyptic number.

145172387 is a deficient number, since it is larger than the sum of its proper divisors (1).

145172387 is an equidigital number, since it uses as much as digits as its factorization.

145172387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 145172387 is about 12048.7504331362. The cubic root of 145172387 is about 525.5669002579.

The spelling of 145172387 in words is "one hundred forty-five million, one hundred seventy-two thousand, three hundred eighty-seven".