74873857 has 2 divisors, whose sum is σ = 74873858. Its totient is φ = 74873856.

The previous prime is 74873849. The next prime is 74873861. The reversal of 74873857 is 75837847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74235456 + 638401 = 8616^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 74873857 - 2³ = 74873849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74873857.

It is not a weakly prime, because it can be changed into another prime (74873807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37436928 + 37436929.

It is an arithmetic number, because the mean of its divisors is an integer number (37436929).

Almost surely, 2^74873857 is an apocalyptic number.

It is an amenable number.

74873857 is a deficient number, since it is larger than the sum of its proper divisors (1).

74873857 is an equidigital number, since it uses as much as digits as its factorization.

74873857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1317120, while the sum is 49.

The square root of 74873857 is about 8652.9681034891. The cubic root of 74873857 is about 421.4797708058.

The spelling of 74873857 in words is "seventy-four million, eight hundred seventy-three thousand, eight hundred fifty-seven".