139980181 has 12 divisors (see below), whose sum is σ = 155054592. Its totient is φ = 126269000.

The previous prime is 139980133. The next prime is 139980209. The reversal of 139980181 is 181089931.

It is a happy number.

It is not a de Polignac number, because 139980181 - 2¹³ = 139971989 is a prime.

It is a super-2 number, since 2×139980181² = 39188902145585522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139980481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11436 + ... + 20266.

It is an arithmetic number, because the mean of its divisors is an integer number (12921216).

Almost surely, 2^139980181 is an apocalyptic number.

139980181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139980181 is a deficient number, since it is larger than the sum of its proper divisors (15074411).

139980181 is a wasteful number, since it uses less digits than its factorization.

139980181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984 (or 8973 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 139980181 is about 11831.3220309482. The cubic root of 139980181 is about 519.2249066382.

The spelling of 139980181 in words is "one hundred thirty-nine million, nine hundred eighty thousand, one hundred eighty-one".