999654101 has 2 divisors, whose sum is σ = 999654102. Its totient is φ = 999654100.

The previous prime is 999654091. The next prime is 999654119. The reversal of 999654101 is 101456999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 886252900 + 113401201 = 29770^2 + 10649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999654101 is a prime.

It is a super-2 number, since 2×999654101² = 1998616643292236402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999654121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499827050 + 499827051.

It is an arithmetic number, because the mean of its divisors is an integer number (499827051).

Almost surely, 2^999654101 is an apocalyptic number.

It is an amenable number.

999654101 is a deficient number, since it is larger than the sum of its proper divisors (1).

999654101 is an equidigital number, since it uses as much as digits as its factorization.

999654101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 999654101 is about 31617.3069852573. The cubic root of 999654101 is about 999.8846870368.

The spelling of 999654101 in words is "nine hundred ninety-nine million, six hundred fifty-four thousand, one hundred one".