53780731 has 2 divisors, whose sum is σ = 53780732. Its totient is φ = 53780730.

The previous prime is 53780719. The next prime is 53780747. The reversal of 53780731 is 13708735.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53780731 - 2¹³ = 53772539 is a prime.

It is a super-2 number, since 2×53780731² = 5784734053788722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53780791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26890365 + 26890366.

It is an arithmetic number, because the mean of its divisors is an integer number (26890366).

Almost surely, 2^53780731 is an apocalyptic number.

53780731 is a deficient number, since it is larger than the sum of its proper divisors (1).

53780731 is an equidigital number, since it uses as much as digits as its factorization.

53780731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 53780731 is about 7333.5346866296. The cubic root of 53780731 is about 377.4640253425.

The spelling of 53780731 in words is "fifty-three million, seven hundred eighty thousand, seven hundred thirty-one".