170988949 has 4 divisors (see below), whose sum is σ = 171197536. Its totient is φ = 170780364.

The previous prime is 170988931. The next prime is 170988977. The reversal of 170988949 is 949889071.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 949889071 = 8951 ⋅106121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170988949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 170988949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170988989) 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, 103059 + ... + 104704.

It is an arithmetic number, because the mean of its divisors is an integer number (42799384).

Almost surely, 2^170988949 is an apocalyptic number.

It is an amenable number.

170988949 is a deficient number, since it is larger than the sum of its proper divisors (208587).

170988949 is an equidigital number, since it uses as much as digits as its factorization.

170988949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208586.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 170988949 is about 13076.2742782491. The cubic root of 170988949 is about 555.0379531982.

The spelling of 170988949 in words is "one hundred seventy million, nine hundred eighty-eight thousand, nine hundred forty-nine".