140997387 has 16 divisors (see below), whose sum is σ = 193235328. Its totient is φ = 91398720.

The previous prime is 140997379. The next prime is 140997397. The reversal of 140997387 is 783799041.

140997387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140997387 - 2³ = 140997379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140997317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27712 + ... + 32402.

It is an arithmetic number, because the mean of its divisors is an integer number (12077208).

Almost surely, 2^140997387 is an apocalyptic number.

140997387 is a deficient number, since it is larger than the sum of its proper divisors (52237941).

140997387 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (140997386) it forms an eRAP, since the sums of their prime factors are consecutive (4969 and 4970).

140997387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 140997387 is about 11874.2320593797. The cubic root of 140997387 is about 520.4795711387.

The spelling of 140997387 in words is "one hundred forty million, nine hundred ninety-seven thousand, three hundred eighty-seven".