736861381 has 2 divisors, whose sum is σ = 736861382. Its totient is φ = 736861380.

The previous prime is 736861369. The next prime is 736861387. The reversal of 736861381 is 183168637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670292100 + 66569281 = 25890^2 + 8159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-736861381 is a prime.

It is a super-2 number, since 2×736861381² = 1085929389618454322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (736861387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 368430690 + 368430691.

It is an arithmetic number, because the mean of its divisors is an integer number (368430691).

Almost surely, 2^736861381 is an apocalyptic number.

It is an amenable number.

736861381 is a deficient number, since it is larger than the sum of its proper divisors (1).

736861381 is an equidigital number, since it uses as much as digits as its factorization.

736861381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 736861381 is about 27145.1907526914. The cubic root of 736861381 is about 903.2235763793.

The spelling of 736861381 in words is "seven hundred thirty-six million, eight hundred sixty-one thousand, three hundred eighty-one".