13900977 has 10 divisors (see below), whose sum is σ = 20765778. Its totient is φ = 9267264.

The previous prime is 13900969. The next prime is 13901003. The reversal of 13900977 is 77900931.

It can be written as a sum of positive squares in only one way, i.e., 13024881 + 876096 = 3609^2 + 936^2 .

It is not a de Polignac number, because 13900977 - 2³ = 13900969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13910977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 85728 + ... + 85889.

Almost surely, 2^13900977 is an apocalyptic number.

It is an amenable number.

13900977 is a deficient number, since it is larger than the sum of its proper divisors (6864801).

13900977 is an equidigital number, since it uses as much as digits as its factorization.

13900977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171629 (or 171620 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 13900977 is about 3728.4014000641. The cubic root of 13900977 is about 240.4446444550. Note that the first 3 decimals are identical.

The spelling of 13900977 in words is "thirteen million, nine hundred thousand, nine hundred seventy-seven".