1097387261 has 8 divisors (see below), whose sum is σ = 1101660384. Its totient is φ = 1093122000.

The previous prime is 1097387233. The next prime is 1097387279. The reversal of 1097387261 is 1627837901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1097387261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097387461) 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, 486386 + ... + 488636.

It is an arithmetic number, because the mean of its divisors is an integer number (137707548).

Almost surely, 2^1097387261 is an apocalyptic number.

It is an amenable number.

1097387261 is a deficient number, since it is larger than the sum of its proper divisors (4273123).

1097387261 is a wasteful number, since it uses less digits than its factorization.

1097387261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 1097387261 is about 33126.8359642149. The cubic root of 1097387261 is about 1031.4621709954.

The spelling of 1097387261 in words is "one billion, ninety-seven million, three hundred eighty-seven thousand, two hundred sixty-one".