654977749 has 2 divisors, whose sum is σ = 654977750. Its totient is φ = 654977748.

The previous prime is 654977711. The next prime is 654977753. The reversal of 654977749 is 947779456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437562724 + 217415025 = 20918^2 + 14745^2 .

It is a cyclic number.

It is not a de Polignac number, because 654977749 - 2⁹ = 654977237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 654977693 and 654977702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654977779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327488874 + 327488875.

It is an arithmetic number, because the mean of its divisors is an integer number (327488875).

Almost surely, 2^654977749 is an apocalyptic number.

It is an amenable number.

654977749 is a deficient number, since it is larger than the sum of its proper divisors (1).

654977749 is an equidigital number, since it uses as much as digits as its factorization.

654977749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13335840, while the sum is 58.

The square root of 654977749 is about 25592.5330711909. The cubic root of 654977749 is about 868.4447260726. Note that the first 3 decimals are identical.

The spelling of 654977749 in words is "six hundred fifty-four million, nine hundred seventy-seven thousand, seven hundred forty-nine".