149783 has 4 divisors (see below), whose sum is σ = 151368. Its totient is φ = 148200.

The previous prime is 149771. The next prime is 149791. The reversal of 149783 is 387941.

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 149783 - 2⁴ = 149767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149713) 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, 641 + ... + 842.

It is an arithmetic number, because the mean of its divisors is an integer number (37842).

2¹⁴⁹⁷⁸³ is an apocalyptic number.

149783 is a deficient number, since it is larger than the sum of its proper divisors (1585).

149783 is a wasteful number, since it uses less digits than its factorization.

149783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584.

The product of its digits is 6048, while the sum is 32.

The square root of 149783 is about 387.0180874326. The cubic root of 149783 is about 53.1072942149.

It can be divided in two parts, 1497 and 83, that multiplied together give a triangular number (124251 = T₄₉₈).

The spelling of 149783 in words is "one hundred forty-nine thousand, seven hundred eighty-three".