74911947 has 12 divisors (see below), whose sum is σ = 109788840. Its totient is φ = 45400960.

The previous prime is 74911933. The next prime is 74911951.

74911947 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74911947 - 2⁴ = 74911931 is a prime.

It is a super-2 number, since 2×74911947² = 11223599606661618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74911899 and 74911908.

It is not an unprimeable number, because it can be changed into a prime (74911997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102822 + ... + 103547.

It is an arithmetic number, because the mean of its divisors is an integer number (9149070).

Almost surely, 2^74911947 is an apocalyptic number.

74911947 is a deficient number, since it is larger than the sum of its proper divisors (34876893).

74911947 is a wasteful number, since it uses less digits than its factorization.

74911947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206394 (or 206383 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 74911947 is about 8655.1688025133. The cubic root of 74911947 is about 421.5512307409.

The spelling of 74911947 in words is "seventy-four million, nine hundred eleven thousand, nine hundred forty-seven".