1077781969 has 24 divisors (see below), whose sum is σ = 1211938560. Its totient is φ = 957459360.

The previous prime is 1077781967. The next prime is 1077781981. The reversal of 1077781969 is 9691877701.

It is not a de Polignac number, because 1077781969 - 2¹ = 1077781967 is a prime.

It is a super-2 number, since 2×1077781969² = 2323227945403033922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1077781967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1591659 + ... + 1592335.

It is an arithmetic number, because the mean of its divisors is an integer number (50497440).

Almost surely, 2^1077781969 is an apocalyptic number.

It is an amenable number.

1077781969 is a deficient number, since it is larger than the sum of its proper divisors (134156591).

1077781969 is a wasteful number, since it uses less digits than its factorization.

1077781969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 55.

The square root of 1077781969 is about 32829.5898390461. The cubic root of 1077781969 is about 1025.2827200288.

The spelling of 1077781969 in words is "one billion, seventy-seven million, seven hundred eighty-one thousand, nine hundred sixty-nine".