1081578077 has 2 divisors, whose sum is σ = 1081578078. Its totient is φ = 1081578076.

The previous prime is 1081578061. The next prime is 1081578089. The reversal of 1081578077 is 7708751801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015951876 + 65626201 = 31874^2 + 8101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081578077 - 2⁴ = 1081578061 is a prime.

It is a super-2 number, since 2×1081578077² = 2339622273294035858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081578977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540789038 + 540789039.

It is an arithmetic number, because the mean of its divisors is an integer number (540789039).

Almost surely, 2^1081578077 is an apocalyptic number.

It is an amenable number.

1081578077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081578077 is an equidigital number, since it uses as much as digits as its factorization.

1081578077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109760, while the sum is 44.

The square root of 1081578077 is about 32887.3543630375. The cubic root of 1081578077 is about 1026.4850421647.

The spelling of 1081578077 in words is "one billion, eighty-one million, five hundred seventy-eight thousand, seventy-seven".