542390197 has 2 divisors, whose sum is σ = 542390198. Its totient is φ = 542390196.

The previous prime is 542390183. The next prime is 542390231. The reversal of 542390197 is 791093245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435598641 + 106791556 = 20871^2 + 10334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542390197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542390897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271195098 + 271195099.

It is an arithmetic number, because the mean of its divisors is an integer number (271195099).

Almost surely, 2^542390197 is an apocalyptic number.

It is an amenable number.

542390197 is a deficient number, since it is larger than the sum of its proper divisors (1).

542390197 is an equidigital number, since it uses as much as digits as its factorization.

542390197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 542390197 is about 23289.2721440581. The cubic root of 542390197 is about 815.5249967809.

The spelling of 542390197 in words is "five hundred forty-two million, three hundred ninety thousand, one hundred ninety-seven".