47790031 has 2 divisors, whose sum is σ = 47790032. Its totient is φ = 47790030.

The previous prime is 47790019. The next prime is 47790089. The reversal of 47790031 is 13009774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47790031 - 2⁹ = 47789519 is a prime.

It is a super-2 number, since 2×47790031² = 4567774125961922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47789975 and 47790002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47790331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23895015 + 23895016.

It is an arithmetic number, because the mean of its divisors is an integer number (23895016).

Almost surely, 2^47790031 is an apocalyptic number.

47790031 is a deficient number, since it is larger than the sum of its proper divisors (1).

47790031 is an equidigital number, since it uses as much as digits as its factorization.

47790031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 47790031 is about 6913.0334152237. The cubic root of 47790031 is about 362.8934287350.

The spelling of 47790031 in words is "forty-seven million, seven hundred ninety thousand, thirty-one".