74747474 has 32 divisors (see below), whose sum is σ = 118745136. Its totient is φ = 35251200.

The previous prime is 74747473. The next prime is 74747507. The reversal of 74747474 is 47474747.

It can be written as a sum of positive squares in 8 ways, for example, as 72165025 + 2582449 = 8495^2 + 1607^2 .

It is an alternating number because its digits alternate between odd and even.

74747474 is an undulating number in base 10.

74747474 is a modest number, since divided by 747474 gives 74 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74747473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545534 + ... + 545670.

Almost surely, 2^74747474 is an apocalyptic number.

74747474 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

74747474 is a deficient number, since it is larger than the sum of its proper divisors (43997662).

74747474 is a wasteful number, since it uses less digits than its factorization.

74747474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350.

The product of its digits is 614656, while the sum is 44.

The square root of 74747474 is about 8645.6621493093. The cubic root of 74747474 is about 421.2424922717.

Adding to 74747474 its reverse (47474747), we get a palindrome (122222221).

The spelling of 74747474 in words is "seventy-four million, seven hundred forty-seven thousand, four hundred seventy-four".