742732217 has 2 divisors, whose sum is σ = 742732218. Its totient is φ = 742732216.

The previous prime is 742732189. The next prime is 742732229. The reversal of 742732217 is 712237247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522625321 + 220106896 = 22861^2 + 14836^2 .

It is a cyclic number.

It is not a de Polignac number, because 742732217 - 2¹⁰ = 742731193 is a prime.

It is a super-2 number, since 2×742732217² = 1103302292339470178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (742732517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371366108 + 371366109.

It is an arithmetic number, because the mean of its divisors is an integer number (371366109).

Almost surely, 2^742732217 is an apocalyptic number.

It is an amenable number.

742732217 is a deficient number, since it is larger than the sum of its proper divisors (1).

742732217 is an equidigital number, since it uses as much as digits as its factorization.

742732217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 35.

The square root of 742732217 is about 27253.1138954799. The cubic root of 742732217 is about 905.6160013588.

The spelling of 742732217 in words is "seven hundred forty-two million, seven hundred thirty-two thousand, two hundred seventeen".