53698749 has 32 divisors (see below), whose sum is σ = 80908800. Its totient is φ = 31449600.

The previous prime is 53698709. The next prime is 53698751. The reversal of 53698749 is 94789635.

It is not a de Polignac number, because 53698749 - 2¹⁵ = 53665981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53698709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89049 + ... + 89649.

It is an arithmetic number, because the mean of its divisors is an integer number (2528400).

Almost surely, 2^53698749 is an apocalyptic number.

It is an amenable number.

53698749 is a deficient number, since it is larger than the sum of its proper divisors (27210051).

53698749 is a wasteful number, since it uses less digits than its factorization.

53698749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its digits is 1632960, while the sum is 51.

The square root of 53698749 is about 7327.9430265252. The cubic root of 53698749 is about 377.2721288984.

The spelling of 53698749 in words is "fifty-three million, six hundred ninety-eight thousand, seven hundred forty-nine".