131923890 has 160 divisors (see below), whose sum is σ = 413994240. Its totient is φ = 29517696.

The previous prime is 131923873. The next prime is 131923903. The reversal of 131923890 is 98329131.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 300291 + ... + 300729.

It is an arithmetic number, because the mean of its divisors is an integer number (2587464).

Almost surely, 2^131923890 is an apocalyptic number.

131923890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131923890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206997120).

131923890 is an abundant number, since it is smaller than the sum of its proper divisors (282070350).

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

131923890 is a wasteful number, since it uses less digits than its factorization.

131923890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 131923890 is about 11485.8125528845. The cubic root of 131923890 is about 509.0664583089.

The spelling of 131923890 in words is "one hundred thirty-one million, nine hundred twenty-three thousand, eight hundred ninety".