1078931421 has 24 divisors (see below), whose sum is σ = 1628949504. Its totient is φ = 713603520.

The previous prime is 1078931419. The next prime is 1078931423. The reversal of 1078931421 is 1241398701.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1078931419) and next prime (1078931423).

It is not a de Polignac number, because 1078931421 - 2¹ = 1078931419 is a prime.

It is a super-2 number, since 2×1078931421² = 2328186022442158482, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078931423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13381 + ... + 48341.

It is an arithmetic number, because the mean of its divisors is an integer number (67872896).

Almost surely, 2^1078931421 is an apocalyptic number.

It is an amenable number.

1078931421 is a deficient number, since it is larger than the sum of its proper divisors (550018083).

1078931421 is an equidigital number, since it uses as much as digits as its factorization.

1078931421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35103 (or 35091 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1078931421 is about 32847.0915150794. The cubic root of 1078931421 is about 1025.6470777543.

The spelling of 1078931421 in words is "one billion, seventy-eight million, nine hundred thirty-one thousand, four hundred twenty-one".