145903687 has 4 divisors (see below), whose sum is σ = 149296840. Its totient is φ = 142510536.

The previous prime is 145903649. The next prime is 145903699. The reversal of 145903687 is 786309541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786309541 = 109 ⋅7213849.

It is a cyclic number.

It is not a de Polignac number, because 145903687 - 2¹⁵ = 145870919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 3393109 = 145903687 / (1 + 4 + 5 + 9 + 0 + 3 + 6 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145903607) 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, 1696512 + ... + 1696597.

It is an arithmetic number, because the mean of its divisors is an integer number (37324210).

Almost surely, 2^145903687 is an apocalyptic number.

145903687 is a deficient number, since it is larger than the sum of its proper divisors (3393153).

145903687 is an equidigital number, since it uses as much as digits as its factorization.

145903687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393152.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 145903687 is about 12079.0598558000. The cubic root of 145903687 is about 526.4479298270.

The spelling of 145903687 in words is "one hundred forty-five million, nine hundred three thousand, six hundred eighty-seven".