16920901 has 2 divisors, whose sum is σ = 16920902. Its totient is φ = 16920900.

The previous prime is 16920859. The next prime is 16920979. The reversal of 16920901 is 10902961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14364100 + 2556801 = 3790^2 + 1599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16920901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16920901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16920401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8460450 + 8460451.

It is an arithmetic number, because the mean of its divisors is an integer number (8460451).

Almost surely, 2^16920901 is an apocalyptic number.

It is an amenable number.

16920901 is a deficient number, since it is larger than the sum of its proper divisors (1).

16920901 is an equidigital number, since it uses as much as digits as its factorization.

16920901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 16920901 is about 4113.5022790804. The cubic root of 16920901 is about 256.7287432543.

The spelling of 16920901 in words is "sixteen million, nine hundred twenty thousand, nine hundred one".