74919239849 has 2 divisors, whose sum is σ = 74919239850. Its totient is φ = 74919239848.

The previous prime is 74919239783. The next prime is 74919239867. The reversal of 74919239849 is 94893291947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68765621824 + 6153618025 = 262232^2 + 78445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74919239849 is a prime.

It is a super-2 number, since 2×74919239849² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74919239869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37459619924 + 37459619925.

It is an arithmetic number, because the mean of its divisors is an integer number (37459619925).

Almost surely, 2^74919239849 is an apocalyptic number.

It is an amenable number.

74919239849 is a deficient number, since it is larger than the sum of its proper divisors (1).

74919239849 is an equidigital number, since it uses as much as digits as its factorization.

74919239849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 65.

The spelling of 74919239849 in words is "seventy-four billion, nine hundred nineteen million, two hundred thirty-nine thousand, eight hundred forty-nine".