1140978397 has 8 divisors (see below), whose sum is σ = 1231846616. Its totient is φ = 1050553152.

The previous prime is 1140978353. The next prime is 1140978401. The reversal of 1140978397 is 7938790411.

It can be written as a sum of positive squares in 4 ways, for example, as 64416676 + 1076561721 = 8026^2 + 32811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1140978397 - 2⁷ = 1140978269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1140978397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140978317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105378 + ... + 115699.

It is an arithmetic number, because the mean of its divisors is an integer number (153980827).

Almost surely, 2^1140978397 is an apocalyptic number.

It is an amenable number.

1140978397 is a deficient number, since it is larger than the sum of its proper divisors (90868219).

1140978397 is a wasteful number, since it uses less digits than its factorization.

1140978397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221487.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 1140978397 is about 33778.3717339957. The cubic root of 1140978397 is about 1044.9426941401.

The spelling of 1140978397 in words is "one billion, one hundred forty million, nine hundred seventy-eight thousand, three hundred ninety-seven".