145187709 has 8 divisors (see below), whose sum is σ = 193666272. Its totient is φ = 96750480.

The previous prime is 145187681. The next prime is 145187761. The reversal of 145187709 is 907781541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145187709 - 2⁸ = 145187453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145187789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907 + ... + 17064.

It is an arithmetic number, because the mean of its divisors is an integer number (24208284).

Almost surely, 2^145187709 is an apocalyptic number.

It is an amenable number.

145187709 is a deficient number, since it is larger than the sum of its proper divisors (48478563).

145187709 is a wasteful number, since it uses less digits than its factorization.

145187709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20667.

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 145187709 is about 12049.3862499299. The cubic root of 145187709 is about 525.5853896620.

The spelling of 145187709 in words is "one hundred forty-five million, one hundred eighty-seven thousand, seven hundred nine".