102689954 has 4 divisors (see below), whose sum is σ = 154034934. Its totient is φ = 51344976.

The previous prime is 102689947. The next prime is 102689981. The reversal of 102689954 is 459986201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 459986201 = 563 ⋅817027.

It can be written as a sum of positive squares in only one way, i.e., 77035729 + 25654225 = 8777^2 + 5065^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25672487 + ... + 25672490.

Almost surely, 2^102689954 is an apocalyptic number.

102689954 is a deficient number, since it is larger than the sum of its proper divisors (51344980).

102689954 is an equidigital number, since it uses as much as digits as its factorization.

102689954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51344979.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 102689954 is about 10133.6051827570. The cubic root of 102689954 is about 468.2840004379.

The spelling of 102689954 in words is "one hundred two million, six hundred eighty-nine thousand, nine hundred fifty-four".