53571997 has 2 divisors, whose sum is σ = 53571998. Its totient is φ = 53571996.

The previous prime is 53571989. The next prime is 53572003. The reversal of 53571997 is 79917535.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31236921 + 22335076 = 5589^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 53571997 - 2³ = 53571989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53671997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26785998 + 26785999.

It is an arithmetic number, because the mean of its divisors is an integer number (26785999).

Almost surely, 2^53571997 is an apocalyptic number.

It is an amenable number.

53571997 is a deficient number, since it is larger than the sum of its proper divisors (1).

53571997 is an equidigital number, since it uses as much as digits as its factorization.

53571997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 297675, while the sum is 46.

The square root of 53571997 is about 7319.2893780749. The cubic root of 53571997 is about 376.9750538740.

The spelling of 53571997 in words is "fifty-three million, five hundred seventy-one thousand, nine hundred ninety-seven".