46821921 has 16 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 29794688.

The previous prime is 46821919. The next prime is 46821923. The reversal of 46821921 is 12912864.

It is an interprime number because it is at equal distance from previous prime (46821919) and next prime (46821923).

It is a cyclic number.

It is not a de Polignac number, because 46821921 - 2¹ = 46821919 is a prime.

It is a super-2 number, since 2×46821921² = 4384584572260482, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (46821923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4720 + ... + 10766.

It is an arithmetic number, because the mean of its divisors is an integer number (4082400).

Almost surely, 2^46821921 is an apocalyptic number.

It is an amenable number.

46821921 is a deficient number, since it is larger than the sum of its proper divisors (18496479).

46821921 is a wasteful number, since it uses less digits than its factorization.

46821921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6168.

The product of its digits is 6912, while the sum is 33.

The square root of 46821921 is about 6842.6545287629. The cubic root of 46821921 is about 360.4262466601.

The spelling of 46821921 in words is "forty-six million, eight hundred twenty-one thousand, nine hundred twenty-one".