74948147 has 2 divisors, whose sum is σ = 74948148. Its totient is φ = 74948146.

The previous prime is 74948129. The next prime is 74948149. The reversal of 74948147 is 74184947.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74948147 - 2⁸ = 74947891 is a prime.

Together with 74948149, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74948098 and 74948107.

It is not a weakly prime, because it can be changed into another prime (74948149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37474073 + 37474074.

It is an arithmetic number, because the mean of its divisors is an integer number (37474074).

Almost surely, 2^74948147 is an apocalyptic number.

74948147 is the 4628-th centered heptagonal number.

74948147 is a deficient number, since it is larger than the sum of its proper divisors (1).

74948147 is an equidigital number, since it uses as much as digits as its factorization.

74948147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 74948147 is about 8657.2597858676. The cubic root of 74948147 is about 421.6191224357.

The spelling of 74948147 in words is "seventy-four million, nine hundred forty-eight thousand, one hundred forty-seven".