2723731 has 2 divisors, whose sum is σ = 2723732. Its totient is φ = 2723730.

The previous prime is 2723719. The next prime is 2723737. The reversal of 2723731 is 1373272.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2723731 is a prime.

It is a super-2 number, since 2×2723731² = 14837421120722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2723696 and 2723705.

It is not a weakly prime, because it can be changed into another prime (2723737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1361865 + 1361866.

It is an arithmetic number, because the mean of its divisors is an integer number (1361866).

2^2723731 is an apocalyptic number.

2723731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2723731 is an equidigital number, since it uses as much as digits as its factorization.

2723731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 25.

The square root of 2723731 is about 1650.3729881454. The cubic root of 2723731 is about 139.6544368611.

The spelling of 2723731 in words is "two million, seven hundred twenty-three thousand, seven hundred thirty-one".