145769487 has 4 divisors (see below), whose sum is σ = 194359320. Its totient is φ = 97179656.

The previous prime is 145769467. The next prime is 145769489. The reversal of 145769487 is 784967541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145769487 - 2⁷ = 145769359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145769489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24294912 + ... + 24294917.

It is an arithmetic number, because the mean of its divisors is an integer number (48589830).

Almost surely, 2^145769487 is an apocalyptic number.

145769487 is a deficient number, since it is larger than the sum of its proper divisors (48589833).

145769487 is an equidigital number, since it uses as much as digits as its factorization.

145769487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48589832.

The product of its digits is 1693440, while the sum is 51.

The square root of 145769487 is about 12073.5035097523. The cubic root of 145769487 is about 526.2864740396.

The spelling of 145769487 in words is "one hundred forty-five million, seven hundred sixty-nine thousand, four hundred eighty-seven".