130997820 has 48 divisors (see below), whose sum is σ = 369280800. Its totient is φ = 34695936.

The previous prime is 130997813. The next prime is 130997827. The reversal of 130997820 is 28799031.

It is an interprime number because it is at equal distance from previous prime (130997813) and next prime (130997827).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130997827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1614 + ... + 16266.

It is an arithmetic number, because the mean of its divisors is an integer number (7693350).

Almost surely, 2^130997820 is an apocalyptic number.

130997820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130997820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184640400).

130997820 is an abundant number, since it is smaller than the sum of its proper divisors (238282980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130997820 is a wasteful number, since it uses less digits than its factorization.

130997820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14814 (or 14812 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 130997820 is about 11445.4279081212. The cubic root of 130997820 is about 507.8724905758.

The spelling of 130997820 in words is "one hundred thirty million, nine hundred ninety-seven thousand, eight hundred twenty".