19214977 has 2 divisors, whose sum is σ = 19214978. Its totient is φ = 19214976.

The previous prime is 19214969. The next prime is 19214983. The reversal of 19214977 is 77941291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18524416 + 690561 = 4304^2 + 831^2 .

It is a cyclic number.

It is not a de Polignac number, because 19214977 - 2³ = 19214969 is a prime.

It is a super-2 number, since 2×19214977² = 738430682221058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19214917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9607488 + 9607489.

It is an arithmetic number, because the mean of its divisors is an integer number (9607489).

Almost surely, 2^19214977 is an apocalyptic number.

It is an amenable number.

19214977 is a deficient number, since it is larger than the sum of its proper divisors (1).

19214977 is an equidigital number, since it uses as much as digits as its factorization.

19214977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 19214977 is about 4383.4891353806. The cubic root of 19214977 is about 267.8427876125.

The spelling of 19214977 in words is "nineteen million, two hundred fourteen thousand, nine hundred seventy-seven".