74978249 has 2 divisors, whose sum is σ = 74978250. Its totient is φ = 74978248.

The previous prime is 74978231. The next prime is 74978261. The reversal of 74978249 is 94287947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 10465225 = 8032^2 + 3235^2 .

It is a cyclic number.

It is not a de Polignac number, because 74978249 - 2¹² = 74974153 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74978197 and 74978206.

It is not a weakly prime, because it can be changed into another prime (74978209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37489124 + 37489125.

It is an arithmetic number, because the mean of its divisors is an integer number (37489125).

Almost surely, 2^74978249 is an apocalyptic number.

It is an amenable number.

74978249 is a deficient number, since it is larger than the sum of its proper divisors (1).

74978249 is an equidigital number, since it uses as much as digits as its factorization.

74978249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 74978249 is about 8658.9981522114. The cubic root of 74978249 is about 421.6755609227.

The spelling of 74978249 in words is "seventy-four million, nine hundred seventy-eight thousand, two hundred forty-nine".