53787769 has 4 divisors (see below), whose sum is σ = 61471744. Its totient is φ = 46103796.

The previous prime is 53787757. The next prime is 53787781. The reversal of 53787769 is 96778735.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96778735 = 5 ⋅19355747.

It is an interprime number because it is at equal distance from previous prime (53787757) and next prime (53787781).

It is a cyclic number.

It is not a de Polignac number, because 53787769 - 2⁵ = 53787737 is a prime.

It is a super-2 number, since 2×53787769² = 5786248187994722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53782769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3841977 + ... + 3841990.

It is an arithmetic number, because the mean of its divisors is an integer number (15367936).

Almost surely, 2^53787769 is an apocalyptic number.

It is an amenable number.

53787769 is a deficient number, since it is larger than the sum of its proper divisors (7683975).

53787769 is an equidigital number, since it uses as much as digits as its factorization.

53787769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7683974.

The product of its digits is 2222640, while the sum is 52.

The square root of 53787769 is about 7334.0145213928. The cubic root of 53787769 is about 377.4804901982.

The spelling of 53787769 in words is "fifty-three million, seven hundred eighty-seven thousand, seven hundred sixty-nine".