1000980781 has 16 divisors (see below), whose sum is σ = 1080555840. Its totient is φ = 924376320.

The previous prime is 1000980779. The next prime is 1000980787. The reversal of 1000980781 is 1870890001.

It is a cyclic number.

It is not a de Polignac number, because 1000980781 - 2¹ = 1000980779 is a prime.

It is a super-2 number, since 2×1000980781² = 2003925047862739922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000980787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127146 + ... + 134788.

It is an arithmetic number, because the mean of its divisors is an integer number (67534740).

Almost surely, 2^1000980781 is an apocalyptic number.

It is an amenable number.

1000980781 is a deficient number, since it is larger than the sum of its proper divisors (79575059).

1000980781 is a wasteful number, since it uses less digits than its factorization.

1000980781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1000980781 is about 31638.2803104088. The cubic root of 1000980781 is about 1000.3268201769.

The spelling of 1000980781 in words is "one billion, nine hundred eighty thousand, seven hundred eighty-one".