1061640723 has 16 divisors (see below), whose sum is σ = 1662990336. Its totient is φ = 593924640.

The previous prime is 1061640659. The next prime is 1061640731. The reversal of 1061640723 is 3270461601.

It is not a de Polignac number, because 1061640723 - 2⁶ = 1061640659 is a prime.

It is a super-2 number, since 2×1061640723² = 2254162049463925458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061640733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236915 + ... + 1237772.

It is an arithmetic number, because the mean of its divisors is an integer number (103936896).

Almost surely, 2^1061640723 is an apocalyptic number.

1061640723 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1061640723 is a deficient number, since it is larger than the sum of its proper divisors (601349613).

1061640723 is a wasteful number, since it uses less digits than its factorization.

1061640723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474714.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1061640723 is about 32582.8286525280. The cubic root of 1061640723 is about 1020.1386211063.

The spelling of 1061640723 in words is "one billion, sixty-one million, six hundred forty thousand, seven hundred twenty-three".