84157923 has 16 divisors (see below), whose sum is σ = 115339136. Its totient is φ = 54552960.

The previous prime is 84157903. The next prime is 84157949. The reversal of 84157923 is 32975148.

It is not a de Polignac number, because 84157923 - 2¹² = 84153827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84157903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29736 + ... + 32442.

It is an arithmetic number, because the mean of its divisors is an integer number (7208696).

Almost surely, 2^84157923 is an apocalyptic number.

84157923 is a deficient number, since it is larger than the sum of its proper divisors (31181213).

84157923 is a wasteful number, since it uses less digits than its factorization.

84157923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its digits is 60480, while the sum is 39.

The square root of 84157923 is about 9173.7627503658. The cubic root of 84157923 is about 438.2261972529.

The spelling of 84157923 in words is "eighty-four million, one hundred fifty-seven thousand, nine hundred twenty-three".