45470921 has 2 divisors, whose sum is σ = 45470922. Its totient is φ = 45470920.

The previous prime is 45470917. The next prime is 45470923. The reversal of 45470921 is 12907454.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31483321 + 13987600 = 5611^2 + 3740^2 .

It is a cyclic number.

It is not a de Polignac number, because 45470921 - 2² = 45470917 is a prime.

Together with 45470923, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (45470923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22735460 + 22735461.

It is an arithmetic number, because the mean of its divisors is an integer number (22735461).

Almost surely, 2^45470921 is an apocalyptic number.

It is an amenable number.

45470921 is a deficient number, since it is larger than the sum of its proper divisors (1).

45470921 is an equidigital number, since it uses as much as digits as its factorization.

45470921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 45470921 is about 6743.2129582270. The cubic root of 45470921 is about 356.9257797253.

It can be divided in two parts, 4 and 5470921, that multiplied together give a square (21883684 = 4678²).

The spelling of 45470921 in words is "forty-five million, four hundred seventy thousand, nine hundred twenty-one".