16920677 has 2 divisors, whose sum is σ = 16920678. Its totient is φ = 16920676.

The previous prime is 16920671. The next prime is 16920679. The reversal of 16920677 is 77602961.

16920677 is nontrivially palindromic in base 12.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14145121 + 2775556 = 3761^2 + 1666^2 .

It is an emirp because it is prime and its reverse (77602961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16920677 - 2¹⁸ = 16658533 is a prime.

It is a super-4 number, since 4×16920677⁴ (a number of 30 digits) contains 4444 as substring.

Together with 16920679, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16920677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16920671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8460338 + 8460339.

It is an arithmetic number, because the mean of its divisors is an integer number (8460339).

Almost surely, 2^16920677 is an apocalyptic number.

It is an amenable number.

16920677 is a deficient number, since it is larger than the sum of its proper divisors (1).

16920677 is an equidigital number, since it uses as much as digits as its factorization.

16920677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 16920677 is about 4113.4750515835. The cubic root of 16920677 is about 256.7276103853.

The spelling of 16920677 in words is "sixteen million, nine hundred twenty thousand, six hundred seventy-seven".