193149490 has 16 divisors (see below), whose sum is σ = 354229848. Its totient is φ = 75801856.

The previous prime is 193149487. The next prime is 193149493. The reversal of 193149490 is 94941391.

It is an interprime number because it is at equal distance from previous prime (193149487) and next prime (193149493).

It can be written as a sum of positive squares in 4 ways, for example, as 178195801 + 14953689 = 13349^2 + 3867^2 .

It is not an unprimeable number, because it can be changed into a prime (193149493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181687 + ... + 182746.

Almost surely, 2^193149490 is an apocalyptic number.

193149490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

193149490 is a deficient number, since it is larger than the sum of its proper divisors (161080358).

193149490 is a wasteful number, since it uses less digits than its factorization.

193149490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364493.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 193149490 is about 13897.8232108485. The cubic root of 193149490 is about 578.0488239150.

The spelling of 193149490 in words is "one hundred ninety-three million, one hundred forty-nine thousand, four hundred ninety".