47333981 has 4 divisors (see below), whose sum is σ = 47351772. Its totient is φ = 47316192.

The previous prime is 47333971. The next prime is 47333983. The reversal of 47333981 is 18933374.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34409956 + 12924025 = 5866^2 + 3595^2 .

It is a cyclic number.

It is not a de Polignac number, because 47333981 - 2⁶ = 47333917 is a prime.

It is a super-2 number, since 2×47333981² = 4481011514616722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47333983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4010 + ... + 10523.

It is an arithmetic number, because the mean of its divisors is an integer number (11837943).

Almost surely, 2^47333981 is an apocalyptic number.

It is an amenable number.

47333981 is a deficient number, since it is larger than the sum of its proper divisors (17791).

47333981 is a wasteful number, since it uses less digits than its factorization.

47333981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17790.

The product of its digits is 54432, while the sum is 38.

The square root of 47333981 is about 6879.9695493512. The cubic root of 47333981 is about 361.7353992649.

The spelling of 47333981 in words is "forty-seven million, three hundred thirty-three thousand, nine hundred eighty-one".