102721379 has 2 divisors, whose sum is σ = 102721380. Its totient is φ = 102721378.

The previous prime is 102721357. The next prime is 102721387. The reversal of 102721379 is 973127201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102721379 - 2¹² = 102717283 is a prime.

It is not a weakly prime, because it can be changed into another prime (102721319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51360689 + 51360690.

It is an arithmetic number, because the mean of its divisors is an integer number (51360690).

Almost surely, 2^102721379 is an apocalyptic number.

102721379 is a deficient number, since it is larger than the sum of its proper divisors (1).

102721379 is an equidigital number, since it uses as much as digits as its factorization.

102721379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 102721379 is about 10135.1555982136. The cubic root of 102721379 is about 468.3317633829.

The spelling of 102721379 in words is "one hundred two million, seven hundred twenty-one thousand, three hundred seventy-nine".