101380649 has 2 divisors, whose sum is σ = 101380650. Its totient is φ = 101380648.

The previous prime is 101380613. The next prime is 101380651. The reversal of 101380649 is 946083101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67240000 + 34140649 = 8200^2 + 5843^2 .

It is a cyclic number.

It is not a de Polignac number, because 101380649 - 2⁸ = 101380393 is a prime.

It is a super-2 number, since 2×101380649² = 20556071983322402, which contains 22 as substring.

Together with 101380651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101380049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50690324 + 50690325.

It is an arithmetic number, because the mean of its divisors is an integer number (50690325).

Almost surely, 2^101380649 is an apocalyptic number.

It is an amenable number.

101380649 is a deficient number, since it is larger than the sum of its proper divisors (1).

101380649 is an equidigital number, since it uses as much as digits as its factorization.

101380649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 101380649 is about 10068.7958068480. The cubic root of 101380649 is about 466.2852622311.

The spelling of 101380649 in words is "one hundred one million, three hundred eighty thousand, six hundred forty-nine".