134803981 has 8 divisors (see below), whose sum is σ = 145285784. Its totient is φ = 124338240.

The previous prime is 134803979. The next prime is 134803997. The reversal of 134803981 is 189308431.

It can be written as a sum of positive squares in 4 ways, for example, as 11881 + 134792100 = 109^2 + 11610^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 134803981 - 2¹ = 134803979 is a prime.

It is a super-2 number, since 2×134803981² = 36344226586896722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134803981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134803181) 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, 17875 + ... + 24271.

It is an arithmetic number, because the mean of its divisors is an integer number (18160723).

Almost surely, 2^134803981 is an apocalyptic number.

It is an amenable number.

134803981 is a deficient number, since it is larger than the sum of its proper divisors (10481803).

134803981 is a wasteful number, since it uses less digits than its factorization.

134803981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8031.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 134803981 is about 11610.5116596987. The cubic root of 134803981 is about 512.7443764948.

The spelling of 134803981 in words is "one hundred thirty-four million, eight hundred three thousand, nine hundred eighty-one".