55742069 has 2 divisors, whose sum is σ = 55742070. Its totient is φ = 55742068.

The previous prime is 55742059. The next prime is 55742081. The reversal of 55742069 is 96024755.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54612100 + 1129969 = 7390^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 55742069 - 2¹² = 55737973 is a prime.

It is a super-2 number, since 2×55742069² = 6214356512801522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55742059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27871034 + 27871035.

It is an arithmetic number, because the mean of its divisors is an integer number (27871035).

Almost surely, 2^55742069 is an apocalyptic number.

It is an amenable number.

55742069 is a deficient number, since it is larger than the sum of its proper divisors (1).

55742069 is an equidigital number, since it uses as much as digits as its factorization.

55742069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 55742069 is about 7466.0611436018. The cubic root of 55742069 is about 381.9979464086.

The spelling of 55742069 in words is "fifty-five million, seven hundred forty-two thousand, sixty-nine".