11397903987 has 8 divisors (see below), whose sum is σ = 15198853120. Its totient is φ = 7597778760.

The previous prime is 11397903949. The next prime is 11397904003. The reversal of 11397903987 is 78930979311.

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

It is not a de Polignac number, because 11397903987 - 2²² = 11393709683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11397903947) 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, 172939 + ... + 229572.

It is an arithmetic number, because the mean of its divisors is an integer number (1899856640).

Almost surely, 2^11397903987 is an apocalyptic number.

11397903987 is a deficient number, since it is larger than the sum of its proper divisors (3800949133).

11397903987 is an equidigital number, since it uses as much as digits as its factorization.

11397903987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411953.

The product of its (nonzero) digits is 2571912, while the sum is 57.

The spelling of 11397903987 in words is "eleven billion, three hundred ninety-seven million, nine hundred three thousand, nine hundred eighty-seven".