47619991 has 2 divisors, whose sum is σ = 47619992. Its totient is φ = 47619990.

The previous prime is 47619931. The next prime is 47619997. The reversal of 47619991 is 19991674.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47619991 - 2¹⁷ = 47488919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47619997) 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, 23809995 + 23809996.

It is an arithmetic number, because the mean of its divisors is an integer number (23809996).

Almost surely, 2^47619991 is an apocalyptic number.

47619991 is a deficient number, since it is larger than the sum of its proper divisors (1).

47619991 is an equidigital number, since it uses as much as digits as its factorization.

47619991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 46.

The square root of 47619991 is about 6900.7239475290. The cubic root of 47619991 is about 362.4625178843.

The spelling of 47619991 in words is "forty-seven million, six hundred nineteen thousand, nine hundred ninety-one".