74942847131 has 2 divisors, whose sum is σ = 74942847132. Its totient is φ = 74942847130.

The previous prime is 74942847101. The next prime is 74942847137. The reversal of 74942847131 is 13174824947.

It is a strong prime.

It is an emirp because it is prime and its reverse (13174824947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74942847131 - 2²² = 74938652827 is a prime.

It is a super-2 number, since 2×74942847131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74942847131.

It is not a weakly prime, because it can be changed into another prime (74942847137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37471423565 + 37471423566.

It is an arithmetic number, because the mean of its divisors is an integer number (37471423566).

Almost surely, 2^74942847131 is an apocalyptic number.

74942847131 is a deficient number, since it is larger than the sum of its proper divisors (1).

74942847131 is an equidigital number, since it uses as much as digits as its factorization.

74942847131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The spelling of 74942847131 in words is "seventy-four billion, nine hundred forty-two million, eight hundred forty-seven thousand, one hundred thirty-one".