145207639 has 2 divisors, whose sum is σ = 145207640. Its totient is φ = 145207638.

The previous prime is 145207619. The next prime is 145207663. The reversal of 145207639 is 936702541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145207639 - 2¹¹ = 145205591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145207598 and 145207607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145207619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72603819 + 72603820.

It is an arithmetic number, because the mean of its divisors is an integer number (72603820).

Almost surely, 2^145207639 is an apocalyptic number.

145207639 is a deficient number, since it is larger than the sum of its proper divisors (1).

145207639 is an equidigital number, since it uses as much as digits as its factorization.

145207639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 145207639 is about 12050.2132346278. The cubic root of 145207639 is about 525.6094376975.

The spelling of 145207639 in words is "one hundred forty-five million, two hundred seven thousand, six hundred thirty-nine".