131947390 has 16 divisors (see below), whose sum is σ = 245695680. Its totient is φ = 50958880.

The previous prime is 131947379. The next prime is 131947391. The reversal of 131947390 is 93749131.

It is a super-2 number, since 2×131947390² = 34820227455624200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131947391) 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, 227206 + ... + 227785.

It is an arithmetic number, because the mean of its divisors is an integer number (15355980).

Almost surely, 2^131947390 is an apocalyptic number.

131947390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131947390 is a deficient number, since it is larger than the sum of its proper divisors (113748290).

131947390 is a wasteful number, since it uses less digits than its factorization.

131947390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455027.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 131947390 is about 11486.8355085289. The cubic root of 131947390 is about 509.0966836949.

The spelling of 131947390 in words is "one hundred thirty-one million, nine hundred forty-seven thousand, three hundred ninety".