53779997 has 2 divisors, whose sum is σ = 53779998. Its totient is φ = 53779996.

The previous prime is 53779967. The next prime is 53780033. The reversal of 53779997 is 79997735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46321636 + 7458361 = 6806^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 53779997 - 2¹² = 53775901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53779967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26889998 + 26889999.

It is an arithmetic number, because the mean of its divisors is an integer number (26889999).

Almost surely, 2^53779997 is an apocalyptic number.

It is an amenable number.

53779997 is a deficient number, since it is larger than the sum of its proper divisors (1).

53779997 is an equidigital number, since it uses as much as digits as its factorization.

53779997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3750705, while the sum is 56.

The square root of 53779997 is about 7333.4846423784. The cubic root of 53779997 is about 377.4623081236.

The spelling of 53779997 in words is "fifty-three million, seven hundred seventy-nine thousand, nine hundred ninety-seven".