74136942949 has 2 divisors, whose sum is σ = 74136942950. Its totient is φ = 74136942948.

The previous prime is 74136942947. The next prime is 74136942977. The reversal of 74136942949 is 94924963147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40090050625 + 34046892324 = 200225^2 + 184518^2 .

It is a cyclic number.

It is not a de Polignac number, because 74136942949 - 2¹ = 74136942947 is a prime.

Together with 74136942947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 74136942893 and 74136942902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74136942947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37068471474 + 37068471475.

It is an arithmetic number, because the mean of its divisors is an integer number (37068471475).

Almost surely, 2^74136942949 is an apocalyptic number.

It is an amenable number.

74136942949 is a deficient number, since it is larger than the sum of its proper divisors (1).

74136942949 is an equidigital number, since it uses as much as digits as its factorization.

74136942949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 58.

The spelling of 74136942949 in words is "seventy-four billion, one hundred thirty-six million, nine hundred forty-two thousand, nine hundred forty-nine".