102690436 has 6 divisors (see below), whose sum is σ = 179708270. Its totient is φ = 51345216.

The previous prime is 102690391. The next prime is 102690443. The reversal of 102690436 is 634096201.

It can be written as a sum of positive squares in only one way, i.e., 74132100 + 28558336 = 8610^2 + 5344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102690398 and 102690407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12836301 + ... + 12836308.

Almost surely, 2^102690436 is an apocalyptic number.

It is an amenable number.

102690436 is a deficient number, since it is larger than the sum of its proper divisors (77017834).

102690436 is a wasteful number, since it uses less digits than its factorization.

102690436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25672613 (or 25672611 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 102690436 is about 10133.6289649858. The cubic root of 102690436 is about 468.2847331046.

The spelling of 102690436 in words is "one hundred two million, six hundred ninety thousand, four hundred thirty-six".