55279069 has 2 divisors, whose sum is σ = 55279070. Its totient is φ = 55279068.

The previous prime is 55279061. The next prime is 55279099. The reversal of 55279069 is 96097255.

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., 28622500 + 26656569 = 5350^2 + 5163^2 .

It is a cyclic number.

It is not a de Polignac number, because 55279069 - 2³ = 55279061 is a prime.

It is a super-2 number, since 2×55279069² = 6111550939013522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55279061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27639534 + 27639535.

It is an arithmetic number, because the mean of its divisors is an integer number (27639535).

Almost surely, 2^55279069 is an apocalyptic number.

It is an amenable number.

55279069 is a deficient number, since it is larger than the sum of its proper divisors (1).

55279069 is an equidigital number, since it uses as much as digits as its factorization.

55279069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 55279069 is about 7434.9895090713. The cubic root of 55279069 is about 380.9373649858.

The spelling of 55279069 in words is "fifty-five million, two hundred seventy-nine thousand, sixty-nine".