74121623 has 2 divisors, whose sum is σ = 74121624. Its totient is φ = 74121622.

The previous prime is 74121601. The next prime is 74121643. The reversal of 74121623 is 32612147.

It is a strong prime.

It is an emirp because it is prime and its reverse (32612147) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74121623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74121592 and 74121601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74121643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37060811 + 37060812.

It is an arithmetic number, because the mean of its divisors is an integer number (37060812).

Almost surely, 2^74121623 is an apocalyptic number.

74121623 is a deficient number, since it is larger than the sum of its proper divisors (1).

74121623 is an equidigital number, since it uses as much as digits as its factorization.

74121623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 74121623 is about 8609.3915580603. The cubic root of 74121623 is about 420.0635259164.

The spelling of 74121623 in words is "seventy-four million, one hundred twenty-one thousand, six hundred twenty-three".