46989991 has 2 divisors, whose sum is σ = 46989992. Its totient is φ = 46989990.

The previous prime is 46989979. The next prime is 46990039. The reversal of 46989991 is 19998964.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 46989991 - 2¹¹ = 46987943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46989931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23494995 + 23494996.

It is an arithmetic number, because the mean of its divisors is an integer number (23494996).

Almost surely, 2^46989991 is an apocalyptic number.

46989991 is a deficient number, since it is larger than the sum of its proper divisors (1).

46989991 is an equidigital number, since it uses as much as digits as its factorization.

46989991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 55.

The square root of 46989991 is about 6854.9245801832. The cubic root of 46989991 is about 360.8569886489.

The spelling of 46989991 in words is "forty-six million, nine hundred eighty-nine thousand, nine hundred ninety-one".