145986987 has 4 divisors (see below), whose sum is σ = 194649320. Its totient is φ = 97324656.

The previous prime is 145986983. The next prime is 145986989. The reversal of 145986987 is 789689541.

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

It is not a de Polignac number, because 145986987 - 2² = 145986983 is a prime.

It is a super-3 number, since 3×145986987³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145986983) 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, 24331162 + ... + 24331167.

It is an arithmetic number, because the mean of its divisors is an integer number (48662330).

Almost surely, 2^145986987 is an apocalyptic number.

145986987 is a deficient number, since it is larger than the sum of its proper divisors (48662333).

145986987 is an equidigital number, since it uses as much as digits as its factorization.

145986987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48662332.

The product of its digits is 4354560, while the sum is 57.

The square root of 145986987 is about 12082.5074798239. The cubic root of 145986987 is about 526.5480981195.

The spelling of 145986987 in words is "one hundred forty-five million, nine hundred eighty-six thousand, nine hundred eighty-seven".