103990399402 has 4 divisors (see below), whose sum is σ = 155985599106. Its totient is φ = 51995199700.

The previous prime is 103990399367. The next prime is 103990399439. The reversal of 103990399402 is 204993099301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 93189162361 + 10801237041 = 305269^2 + 103929^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25997599849 + ... + 25997599852.

Almost surely, 2^103990399402 is an apocalyptic number.

103990399402 is a deficient number, since it is larger than the sum of its proper divisors (51995199704).

103990399402 is an equidigital number, since it uses as much as digits as its factorization.

103990399402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51995199703.

The product of its (nonzero) digits is 472392, while the sum is 49.

The spelling of 103990399402 in words is "one hundred three billion, nine hundred ninety million, three hundred ninety-nine thousand, four hundred two".