1097996157 has 12 divisors (see below), whose sum is σ = 1611995164. Its totient is φ = 719997120.

The previous prime is 1097996143. The next prime is 1097996183. The reversal of 1097996157 is 7516997901.

It is a happy number.

1097996157 is a `hidden beast` number, since 10 + 9 + 7 + 9 + 9 + 615 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56385081 + 1041611076 = 7509^2 + 32274^2 .

It is not a de Polignac number, because 1097996157 - 2¹⁵ = 1097963389 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 (1097992157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 999448 + ... + 1000545.

Almost surely, 2^1097996157 is an apocalyptic number.

It is an amenable number.

1097996157 is a deficient number, since it is larger than the sum of its proper divisors (513999007).

1097996157 is a wasteful number, since it uses less digits than its factorization.

1097996157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000060 (or 2000057 counting only the distinct ones).

The product of its (nonzero) digits is 1071630, while the sum is 54.

The square root of 1097996157 is about 33136.0250633657. The cubic root of 1097996157 is about 1031.6529079964.

The spelling of 1097996157 in words is "one billion, ninety-seven million, nine hundred ninety-six thousand, one hundred fifty-seven".