74840831 has 4 divisors (see below), whose sum is σ = 80597832. Its totient is φ = 69083832.

The previous prime is 74840819. The next prime is 74840837. The reversal of 74840831 is 13804847.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13804847 = 7 ⋅1972121.

It is a cyclic number.

It is not a de Polignac number, because 74840831 - 2¹⁸ = 74578687 is a prime.

It is a super-2 number, since 2×74840831² = 11202299969541122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74840791 and 74840800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74840837) 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, 2878481 + ... + 2878506.

It is an arithmetic number, because the mean of its divisors is an integer number (20149458).

Almost surely, 2^74840831 is an apocalyptic number.

74840831 is a deficient number, since it is larger than the sum of its proper divisors (5757001).

74840831 is a wasteful number, since it uses less digits than its factorization.

74840831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5757000.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 74840831 is about 8651.0595304853. The cubic root of 74840831 is about 421.4177917271.

The spelling of 74840831 in words is "seventy-four million, eight hundred forty thousand, eight hundred thirty-one".