108931402 has 4 divisors (see below), whose sum is σ = 163397106. Its totient is φ = 54465700.

The previous prime is 108931379. The next prime is 108931409. The reversal of 108931402 is 204139801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204139801 = 2719 ⋅75079.

It can be written as a sum of positive squares in only one way, i.e., 58507201 + 50424201 = 7649^2 + 7101^2 .

It is not an unprimeable number, because it can be changed into a prime (108931409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27232849 + ... + 27232852.

Almost surely, 2^108931402 is an apocalyptic number.

108931402 is a deficient number, since it is larger than the sum of its proper divisors (54465704).

108931402 is an equidigital number, since it uses as much as digits as its factorization.

108931402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54465703.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 108931402 is about 10437.0207434881. The cubic root of 108931402 is about 477.5853882730.

The spelling of 108931402 in words is "one hundred eight million, nine hundred thirty-one thousand, four hundred two".