69144997 has 2 divisors, whose sum is σ = 69144998. Its totient is φ = 69144996.

The previous prime is 69144979. The next prime is 69145003. The reversal of 69144997 is 79944196.

Together with previous prime (69144979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61449921 + 7695076 = 7839^2 + 2774^2 .

It is a cyclic number.

It is not a de Polignac number, because 69144997 - 2⁷ = 69144869 is a prime.

It is a super-2 number, since 2×69144997² = 9562061220260018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 69144997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69144917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34572498 + 34572499.

It is an arithmetic number, because the mean of its divisors is an integer number (34572499).

Almost surely, 2^69144997 is an apocalyptic number.

It is an amenable number.

69144997 is a deficient number, since it is larger than the sum of its proper divisors (1).

69144997 is an equidigital number, since it uses as much as digits as its factorization.

69144997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 69144997 is about 8315.3470763402. The cubic root of 69144997 is about 410.4436937730.

It can be divided in two parts, 6914 and 4997, that added together give a palindrome (11911).

The spelling of 69144997 in words is "sixty-nine million, one hundred forty-four thousand, nine hundred ninety-seven".