542742749 has 2 divisors, whose sum is σ = 542742750. Its totient is φ = 542742748.

The previous prime is 542742713. The next prime is 542742763. The reversal of 542742749 is 947247245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539075524 + 3667225 = 23218^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 542742749 - 2¹² = 542738653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542742769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271371374 + 271371375.

It is an arithmetic number, because the mean of its divisors is an integer number (271371375).

Almost surely, 2^542742749 is an apocalyptic number.

It is an amenable number.

542742749 is a deficient number, since it is larger than the sum of its proper divisors (1).

542742749 is an equidigital number, since it uses as much as digits as its factorization.

542742749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 44.

The square root of 542742749 is about 23296.8398929984. The cubic root of 542742749 is about 815.7016547774.

The spelling of 542742749 in words is "five hundred forty-two million, seven hundred forty-two thousand, seven hundred forty-nine".