145562989 has 8 divisors (see below), whose sum is σ = 171011232. Its totient is φ = 122150640.

The previous prime is 145562981. The next prime is 145563007. The reversal of 145562989 is 989265541.

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

It is a cyclic number.

It is not a de Polignac number, because 145562989 - 2³ = 145562981 is a prime.

It is a super-2 number, since 2×145562989² = 42377167533228242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145562981) 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, 508819 + ... + 509104.

It is an arithmetic number, because the mean of its divisors is an integer number (21376404).

Almost surely, 2^145562989 is an apocalyptic number.

It is an amenable number.

145562989 is a deficient number, since it is larger than the sum of its proper divisors (25448243).

145562989 is a wasteful number, since it uses less digits than its factorization.

145562989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017947.

The product of its digits is 777600, while the sum is 49.

The square root of 145562989 is about 12064.9487773467. The cubic root of 145562989 is about 526.0378429886.

The spelling of 145562989 in words is "one hundred forty-five million, five hundred sixty-two thousand, nine hundred eighty-nine".