46420721 has 2 divisors, whose sum is σ = 46420722. Its totient is φ = 46420720.

The previous prime is 46420691. The next prime is 46420747. The reversal of 46420721 is 12702464.

It is an a-pointer prime, because the next prime (46420747) can be obtained adding 46420721 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44823025 + 1597696 = 6695^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 46420721 - 2⁶ = 46420657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (46422721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23210360 + 23210361.

It is an arithmetic number, because the mean of its divisors is an integer number (23210361).

Almost surely, 2^46420721 is an apocalyptic number.

It is an amenable number.

46420721 is a deficient number, since it is larger than the sum of its proper divisors (1).

46420721 is an equidigital number, since it uses as much as digits as its factorization.

46420721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 46420721 is about 6813.2753503730. The cubic root of 46420721 is about 359.3938384680.

The spelling of 46420721 in words is "forty-six million, four hundred twenty thousand, seven hundred twenty-one".