378202261 has 2 divisors, whose sum is σ = 378202262. Its totient is φ = 378202260.

The previous prime is 378202249. The next prime is 378202283. The reversal of 378202261 is 162202873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332369361 + 45832900 = 18231^2 + 6770^2 .

It is a cyclic number.

It is not a de Polignac number, because 378202261 - 2⁵ = 378202229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378202211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189101130 + 189101131.

It is an arithmetic number, because the mean of its divisors is an integer number (189101131).

Almost surely, 2^378202261 is an apocalyptic number.

It is an amenable number.

378202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

378202261 is an equidigital number, since it uses as much as digits as its factorization.

378202261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 378202261 is about 19447.4229912346. The cubic root of 378202261 is about 723.1716186344.

The spelling of 378202261 in words is "three hundred seventy-eight million, two hundred two thousand, two hundred sixty-one".