1061622731 has 4 divisors (see below), whose sum is σ = 1143286032. Its totient is φ = 979959432.

The previous prime is 1061622719. The next prime is 1061622761. The reversal of 1061622731 is 1372261601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1372261601 = 277 ⋅4954013.

It is a cyclic number.

It is not a de Polignac number, because 1061622731 - 2¹⁰ = 1061621707 is a prime.

It is a super-2 number, since 2×1061622731² = 2254085645951796722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1061622694 and 1061622703.

It is not an unprimeable number, because it can be changed into a prime (1061622761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40831631 + ... + 40831656.

It is an arithmetic number, because the mean of its divisors is an integer number (285821508).

Almost surely, 2^1061622731 is an apocalyptic number.

1061622731 is a deficient number, since it is larger than the sum of its proper divisors (81663301).

1061622731 is an equidigital number, since it uses as much as digits as its factorization.

1061622731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81663300.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1061622731 is about 32582.5525550102. The cubic root of 1061622731 is about 1020.1328581907.

The spelling of 1061622731 in words is "one billion, sixty-one million, six hundred twenty-two thousand, seven hundred thirty-one".