84157474 has 4 divisors (see below), whose sum is σ = 126236214. Its totient is φ = 42078736.

The previous prime is 84157471. The next prime is 84157487. The reversal of 84157474 is 47475148.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 44555625 + 39601849 = 6675^2 + 6293^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (84157471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21039367 + ... + 21039370.

Almost surely, 2^84157474 is an apocalyptic number.

84157474 is a deficient number, since it is larger than the sum of its proper divisors (42078740).

84157474 is a wasteful number, since it uses less digits than its factorization.

84157474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42078739.

The product of its digits is 125440, while the sum is 40.

The square root of 84157474 is about 9173.7382783683. The cubic root of 84157474 is about 438.2254179089.

The spelling of 84157474 in words is "eighty-four million, one hundred fifty-seven thousand, four hundred seventy-four".