1097956887 has 4 divisors (see below), whose sum is σ = 1463942520. Its totient is φ = 731971256.

The previous prime is 1097956879. The next prime is 1097956889. The reversal of 1097956887 is 7886597901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1097956887 - 2³ = 1097956879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1097956887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097956889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182992812 + ... + 182992817.

It is an arithmetic number, because the mean of its divisors is an integer number (365985630).

Almost surely, 2^1097956887 is an apocalyptic number.

1097956887 is a deficient number, since it is larger than the sum of its proper divisors (365985633).

1097956887 is an equidigital number, since it uses as much as digits as its factorization.

1097956887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365985632.

The product of its (nonzero) digits is 7620480, while the sum is 60.

The square root of 1097956887 is about 33135.4325005726. The cubic root of 1097956887 is about 1031.6406087752.

The spelling of 1097956887 in words is "one billion, ninety-seven million, nine hundred fifty-six thousand, eight hundred eighty-seven".