47780731 has 2 divisors, whose sum is σ = 47780732. Its totient is φ = 47780730.

The previous prime is 47780723. The next prime is 47780741. The reversal of 47780731 is 13708774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47780731 - 2³ = 47780723 is a prime.

It is a super-2 number, since 2×47780731² = 4565996509788722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47780741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23890365 + 23890366.

It is an arithmetic number, because the mean of its divisors is an integer number (23890366).

Almost surely, 2^47780731 is an apocalyptic number.

47780731 is a deficient number, since it is larger than the sum of its proper divisors (1).

47780731 is an equidigital number, since it uses as much as digits as its factorization.

47780731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 47780731 is about 6912.3607400077. The cubic root of 47780731 is about 362.8698873691.

The spelling of 47780731 in words is "forty-seven million, seven hundred eighty thousand, seven hundred thirty-one".