74800981 has 2 divisors, whose sum is σ = 74800982. Its totient is φ = 74800980.

The previous prime is 74800961. The next prime is 74800987. The reversal of 74800981 is 18900847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74545956 + 255025 = 8634^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 74800981 - 2¹³ = 74792789 is a prime.

It is a super-2 number, since 2×74800981² = 11190373517124722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74800981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74800987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37400490 + 37400491.

It is an arithmetic number, because the mean of its divisors is an integer number (37400491).

Almost surely, 2^74800981 is an apocalyptic number.

It is an amenable number.

74800981 is a deficient number, since it is larger than the sum of its proper divisors (1).

74800981 is an equidigital number, since it uses as much as digits as its factorization.

74800981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 74800981 is about 8648.7560377201. The cubic root of 74800981 is about 421.3429819372.

The spelling of 74800981 in words is "seventy-four million, eight hundred thousand, nine hundred eighty-one".