171978130 has 16 divisors (see below), whose sum is σ = 323020224. Its totient is φ = 65800240.

The previous prime is 171978127. The next prime is 171978133. The reversal of 171978130 is 31879171.

It is an interprime number because it is at equal distance from previous prime (171978127) and next prime (171978133).

It is a self number, because there is not a number n which added to its sum of digits gives 171978130.

It is not an unprimeable number, because it can be changed into a prime (171978133) 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, 373636 + ... + 374095.

It is an arithmetic number, because the mean of its divisors is an integer number (20188764).

Almost surely, 2^171978130 is an apocalyptic number.

171978130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

171978130 is a deficient number, since it is larger than the sum of its proper divisors (151042094).

171978130 is a wasteful number, since it uses less digits than its factorization.

171978130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747761.

The product of its (nonzero) digits is 10584, while the sum is 37.

The square root of 171978130 is about 13114.0432361648. The cubic root of 171978130 is about 556.1062048038.

The spelling of 171978130 in words is "one hundred seventy-one million, nine hundred seventy-eight thousand, one hundred thirty".