47787631 has 2 divisors, whose sum is σ = 47787632. Its totient is φ = 47787630.

The previous prime is 47787599. The next prime is 47787637. The reversal of 47787631 is 13678774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47787631 - 2⁵ = 47787599 is a prime.

It is a super-2 number, since 2×47787631² = 4567315353184322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47787637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23893815 + 23893816.

It is an arithmetic number, because the mean of its divisors is an integer number (23893816).

Almost surely, 2^47787631 is an apocalyptic number.

47787631 is a deficient number, since it is larger than the sum of its proper divisors (1).

47787631 is an equidigital number, since it uses as much as digits as its factorization.

47787631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 43.

The square root of 47787631 is about 6912.8598278860. The cubic root of 47787631 is about 362.8873538362.

The spelling of 47787631 in words is "forty-seven million, seven hundred eighty-seven thousand, six hundred thirty-one".