145770709 has 4 divisors (see below), whose sum is σ = 166595104. Its totient is φ = 124946316.

The previous prime is 145770671. The next prime is 145770743. The reversal of 145770709 is 907077541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145770709 - 2⁹ = 145770197 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 (145770409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10412187 + ... + 10412200.

It is an arithmetic number, because the mean of its divisors is an integer number (41648776).

Almost surely, 2^145770709 is an apocalyptic number.

It is an amenable number.

145770709 is a deficient number, since it is larger than the sum of its proper divisors (20824395).

145770709 is an equidigital number, since it uses as much as digits as its factorization.

145770709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20824394.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 145770709 is about 12073.5541163321. The cubic root of 145770709 is about 526.2879446727.

The spelling of 145770709 in words is "one hundred forty-five million, seven hundred seventy thousand, seven hundred nine".