47578919 has 2 divisors, whose sum is σ = 47578920. Its totient is φ = 47578918.

The previous prime is 47578913. The next prime is 47578931. The reversal of 47578919 is 91987574.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47578919 - 2²⁴ = 30801703 is a prime.

It is a super-2 number, since 2×47578919² = 4527507066417122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47578913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23789459 + 23789460.

It is an arithmetic number, because the mean of its divisors is an integer number (23789460).

Almost surely, 2^47578919 is an apocalyptic number.

47578919 is a deficient number, since it is larger than the sum of its proper divisors (1).

47578919 is an equidigital number, since it uses as much as digits as its factorization.

47578919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 47578919 is about 6897.7473859225. The cubic root of 47578919 is about 362.3582805512.

The spelling of 47578919 in words is "forty-seven million, five hundred seventy-eight thousand, nine hundred nineteen".