74284981 has 2 divisors, whose sum is σ = 74284982. Its totient is φ = 74284980.

The previous prime is 74284933. The next prime is 74285017. The reversal of 74284981 is 18948247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 152881 = 8610^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 74284981 - 2²³ = 65896373 is a prime.

It is a super-2 number, since 2×74284981² = 11036516804340722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74284681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37142490 + 37142491.

It is an arithmetic number, because the mean of its divisors is an integer number (37142491).

Almost surely, 2^74284981 is an apocalyptic number.

It is an amenable number.

74284981 is a deficient number, since it is larger than the sum of its proper divisors (1).

74284981 is an equidigital number, since it uses as much as digits as its factorization.

74284981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 74284981 is about 8618.8735342851. The cubic root of 74284981 is about 420.3718947154.

The spelling of 74284981 in words is "seventy-four million, two hundred eighty-four thousand, nine hundred eighty-one".