102978377 has 2 divisors, whose sum is σ = 102978378. Its totient is φ = 102978376.

The previous prime is 102978371. The next prime is 102978389. The reversal of 102978377 is 773879201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82011136 + 20967241 = 9056^2 + 4579^2 .

It is a cyclic number.

It is not a de Polignac number, because 102978377 - 2⁶ = 102978313 is a prime.

It is a super-2 number, since 2×102978377² = 21209092259108258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102978371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51489188 + 51489189.

It is an arithmetic number, because the mean of its divisors is an integer number (51489189).

Almost surely, 2^102978377 is an apocalyptic number.

It is an amenable number.

102978377 is a deficient number, since it is larger than the sum of its proper divisors (1).

102978377 is an equidigital number, since it uses as much as digits as its factorization.

102978377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 102978377 is about 10147.8262204277. The cubic root of 102978377 is about 468.7220102517.

The spelling of 102978377 in words is "one hundred two million, nine hundred seventy-eight thousand, three hundred seventy-seven".