46649821 has 2 divisors, whose sum is σ = 46649822. Its totient is φ = 46649820.

The previous prime is 46649809. The next prime is 46649839. The reversal of 46649821 is 12894664.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46389721 + 260100 = 6811^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 46649821 - 2¹³ = 46641629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46649861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23324910 + 23324911.

It is an arithmetic number, because the mean of its divisors is an integer number (23324911).

Almost surely, 2^46649821 is an apocalyptic number.

It is an amenable number.

46649821 is a deficient number, since it is larger than the sum of its proper divisors (1).

46649821 is an equidigital number, since it uses as much as digits as its factorization.

46649821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 46649821 is about 6830.0674228005. The cubic root of 46649821 is about 359.9841068086.

The spelling of 46649821 in words is "forty-six million, six hundred forty-nine thousand, eight hundred twenty-one".