74181953 has 2 divisors, whose sum is σ = 74181954. Its totient is φ = 74181952.

The previous prime is 74181949. The next prime is 74181959. The reversal of 74181953 is 35918147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71436304 + 2745649 = 8452^2 + 1657^2 .

It is an emirp because it is prime and its reverse (35918147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74181953 - 2² = 74181949 is a prime.

It is not a weakly prime, because it can be changed into another prime (74181959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37090976 + 37090977.

It is an arithmetic number, because the mean of its divisors is an integer number (37090977).

Almost surely, 2^74181953 is an apocalyptic number.

It is an amenable number.

74181953 is a deficient number, since it is larger than the sum of its proper divisors (1).

74181953 is an equidigital number, since it uses as much as digits as its factorization.

74181953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 74181953 is about 8612.8945773184. The cubic root of 74181953 is about 420.1774627989.

The spelling of 74181953 in words is "seventy-four million, one hundred eighty-one thousand, nine hundred fifty-three".