74247477 has 4 divisors (see below), whose sum is σ = 98996640. Its totient is φ = 49498316.

The previous prime is 74247463. The next prime is 74247487. The reversal of 74247477 is 77474247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77474247 = 3 ⋅25824749.

It is a cyclic number.

It is not a de Polignac number, because 74247477 - 2⁴ = 74247461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74247487) 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, 12374577 + ... + 12374582.

It is an arithmetic number, because the mean of its divisors is an integer number (24749160).

Almost surely, 2^74247477 is an apocalyptic number.

It is an amenable number.

74247477 is a deficient number, since it is larger than the sum of its proper divisors (24749163).

74247477 is a wasteful number, since it uses less digits than its factorization.

74247477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24749162.

The product of its digits is 307328, while the sum is 42.

The square root of 74247477 is about 8616.6975692547. The cubic root of 74247477 is about 420.3011389079.

The spelling of 74247477 in words is "seventy-four million, two hundred forty-seven thousand, four hundred seventy-seven".