74699647 has 4 divisors (see below), whose sum is σ = 81490536. Its totient is φ = 67908760.

The previous prime is 74699629. The next prime is 74699693.

74699647 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74699647 - 2⁷ = 74699519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74699594 and 74699603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74699047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3395428 + ... + 3395449.

It is an arithmetic number, because the mean of its divisors is an integer number (20372634).

Almost surely, 2^74699647 is an apocalyptic number.

74699647 is a deficient number, since it is larger than the sum of its proper divisors (6790889).

74699647 is a wasteful number, since it uses less digits than its factorization.

74699647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6790888.

The product of its digits is 2286144, while the sum is 52.

The square root of 74699647 is about 8642.8957531605. The cubic root of 74699647 is about 421.1526294216.

The spelling of 74699647 in words is "seventy-four million, six hundred ninety-nine thousand, six hundred forty-seven".