46779221 has 2 divisors, whose sum is σ = 46779222. Its totient is φ = 46779220.

The previous prime is 46779193. The next prime is 46779251. The reversal of 46779221 is 12297764.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46648900 + 130321 = 6830^2 + 361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-46779221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46779251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23389610 + 23389611.

It is an arithmetic number, because the mean of its divisors is an integer number (23389611).

Almost surely, 2^46779221 is an apocalyptic number.

It is an amenable number.

46779221 is a deficient number, since it is larger than the sum of its proper divisors (1).

46779221 is an equidigital number, since it uses as much as digits as its factorization.

46779221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 46779221 is about 6839.5336829348. The cubic root of 46779221 is about 360.3166478424.

The spelling of 46779221 in words is "forty-six million, seven hundred seventy-nine thousand, two hundred twenty-one".