53207749 has 16 divisors (see below), whose sum is σ = 63037440. Its totient is φ = 43948080.

The previous prime is 53207747. The next prime is 53207753. The reversal of 53207749 is 94770235.

It is not a de Polignac number, because 53207749 - 2¹ = 53207747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53207743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77562 + ... + 78244.

It is an arithmetic number, because the mean of its divisors is an integer number (3939840).

Almost surely, 2^53207749 is an apocalyptic number.

It is an amenable number.

53207749 is a deficient number, since it is larger than the sum of its proper divisors (9829691).

53207749 is a wasteful number, since it uses less digits than its factorization.

53207749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 53207749 is about 7294.3641943627. The cubic root of 53207749 is about 376.1187308946.

It can be divided in two parts, 53207 and 749, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 53207749 in words is "fifty-three million, two hundred seven thousand, seven hundred forty-nine".