545423731 has 2 divisors, whose sum is σ = 545423732. Its totient is φ = 545423730.

The previous prime is 545423719. The next prime is 545423761. The reversal of 545423731 is 137324545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545423731 - 2²³ = 537035123 is a prime.

It is a super-2 number, since 2×545423731² = 594974092675920722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (545423761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272711865 + 272711866.

It is an arithmetic number, because the mean of its divisors is an integer number (272711866).

Almost surely, 2^545423731 is an apocalyptic number.

545423731 is a deficient number, since it is larger than the sum of its proper divisors (1).

545423731 is an equidigital number, since it uses as much as digits as its factorization.

545423731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 34.

The square root of 545423731 is about 23354.3086174693. The cubic root of 545423731 is about 817.0425542900.

The spelling of 545423731 in words is "five hundred forty-five million, four hundred twenty-three thousand, seven hundred thirty-one".