74361557 has 2 divisors, whose sum is σ = 74361558. Its totient is φ = 74361556.

The previous prime is 74361541. The next prime is 74361559. The reversal of 74361557 is 75516347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 17901361 = 7514^2 + 4231^2 .

It is an emirp because it is prime and its reverse (75516347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74361557 - 2⁴ = 74361541 is a prime.

Together with 74361559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74361557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74361559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37180778 + 37180779.

It is an arithmetic number, because the mean of its divisors is an integer number (37180779).

Almost surely, 2^74361557 is an apocalyptic number.

It is an amenable number.

74361557 is a deficient number, since it is larger than the sum of its proper divisors (1).

74361557 is an equidigital number, since it uses as much as digits as its factorization.

74361557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 38.

The square root of 74361557 is about 8623.3147339060. The cubic root of 74361557 is about 420.5162906308.

The spelling of 74361557 in words is "seventy-four million, three hundred sixty-one thousand, five hundred fifty-seven".