213977941 has 2 divisors, whose sum is σ = 213977942. Its totient is φ = 213977940.

The previous prime is 213977927. The next prime is 213977957. The reversal of 213977941 is 149779312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197543025 + 16434916 = 14055^2 + 4054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213977941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213975941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106988970 + 106988971.

It is an arithmetic number, because the mean of its divisors is an integer number (106988971).

Almost surely, 2^213977941 is an apocalyptic number.

It is an amenable number.

213977941 is a deficient number, since it is larger than the sum of its proper divisors (1).

213977941 is an equidigital number, since it uses as much as digits as its factorization.

213977941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 43.

The square root of 213977941 is about 14627.9848577991. The cubic root of 213977941 is about 598.1218502047.

The spelling of 213977941 in words is "two hundred thirteen million, nine hundred seventy-seven thousand, nine hundred forty-one".