742187917 has 2 divisors, whose sum is σ = 742187918. Its totient is φ = 742187916.

The previous prime is 742187903. The next prime is 742187933. The reversal of 742187917 is 719781247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544335561 + 197852356 = 23331^2 + 14066^2 .

It is a cyclic number.

It is not a de Polignac number, because 742187917 - 2¹¹ = 742185869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742187977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371093958 + 371093959.

It is an arithmetic number, because the mean of its divisors is an integer number (371093959).

Almost surely, 2^742187917 is an apocalyptic number.

It is an amenable number.

742187917 is a deficient number, since it is larger than the sum of its proper divisors (1).

742187917 is an equidigital number, since it uses as much as digits as its factorization.

742187917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 46.

The square root of 742187917 is about 27243.1260504370. The cubic root of 742187917 is about 905.3947249963.

The spelling of 742187917 in words is "seven hundred forty-two million, one hundred eighty-seven thousand, nine hundred seventeen".