1187904697 has 16 divisors (see below), whose sum is σ = 1386950400. Its totient is φ = 1017000096.

The previous prime is 1187904671. The next prime is 1187904749. The reversal of 1187904697 is 7964097811.

It is not a de Polignac number, because 1187904697 - 2¹⁹ = 1187380409 is a prime.

It is a super-2 number, since 2×1187904697² = 2822235138309323618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187904607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407748 + ... + 410650.

It is an arithmetic number, because the mean of its divisors is an integer number (86684400).

Almost surely, 2^1187904697 is an apocalyptic number.

It is an amenable number.

1187904697 is a deficient number, since it is larger than the sum of its proper divisors (199045703).

1187904697 is an equidigital number, since it uses as much as digits as its factorization.

1187904697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117 (or 4103 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 1187904697 is about 34465.9933412632. The cubic root of 1187904697 is about 1059.0761788988.

The spelling of 1187904697 in words is "one billion, one hundred eighty-seven million, nine hundred four thousand, six hundred ninety-seven".