1089337721 has 2 divisors, whose sum is σ = 1089337722. Its totient is φ = 1089337720.

The previous prime is 1089337699. The next prime is 1089337727. The reversal of 1089337721 is 1277339801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1040965696 + 48372025 = 32264^2 + 6955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089337721 - 2²² = 1085143417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1089337727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544668860 + 544668861.

It is an arithmetic number, because the mean of its divisors is an integer number (544668861).

Almost surely, 2^1089337721 is an apocalyptic number.

It is an amenable number.

1089337721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089337721 is an equidigital number, since it uses as much as digits as its factorization.

1089337721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1089337721 is about 33005.1165881898. The cubic root of 1089337721 is about 1028.9339902621.

The spelling of 1089337721 in words is "one billion, eighty-nine million, three hundred thirty-seven thousand, seven hundred twenty-one".