53997907 has 2 divisors, whose sum is σ = 53997908. Its totient is φ = 53997906.

The previous prime is 53997887. The next prime is 53997917. The reversal of 53997907 is 70979935.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53997907 is a prime.

It is not a weakly prime, because it can be changed into another prime (53997917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26998953 + 26998954.

It is an arithmetic number, because the mean of its divisors is an integer number (26998954).

Almost surely, 2^53997907 is an apocalyptic number.

53997907 is a deficient number, since it is larger than the sum of its proper divisors (1).

53997907 is an equidigital number, since it uses as much as digits as its factorization.

53997907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 535815, while the sum is 49.

The square root of 53997907 is about 7348.3268163576. The cubic root of 53997907 is about 377.9714315447.

The spelling of 53997907 in words is "fifty-three million, nine hundred ninety-seven thousand, nine hundred seven".