74828857 has 2 divisors, whose sum is σ = 74828858. Its totient is φ = 74828856.

The previous prime is 74828833. The next prime is 74828861. The reversal of 74828857 is 75882847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74287161 + 541696 = 8619^2 + 736^2 .

It is an emirp because it is prime and its reverse (75882847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74828857 - 2¹⁵ = 74796089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74828857.

It is not a weakly prime, because it can be changed into another prime (74828057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37414428 + 37414429.

It is an arithmetic number, because the mean of its divisors is an integer number (37414429).

Almost surely, 2^74828857 is an apocalyptic number.

It is an amenable number.

74828857 is a deficient number, since it is larger than the sum of its proper divisors (1).

74828857 is an equidigital number, since it uses as much as digits as its factorization.

74828857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1003520, while the sum is 49.

The square root of 74828857 is about 8650.3674488429. The cubic root of 74828857 is about 421.3953159132.

The spelling of 74828857 in words is "seventy-four million, eight hundred twenty-eight thousand, eight hundred fifty-seven".