1958432261 has 2 divisors, whose sum is σ = 1958432262. Its totient is φ = 1958432260.

The previous prime is 1958432243. The next prime is 1958432279. The reversal of 1958432261 is 1622348591.

It is a balanced prime because it is at equal distance from previous prime (1958432243) and next prime (1958432279).

It can be written as a sum of positive squares in only one way, i.e., 1783372900 + 175059361 = 42230^2 + 13231^2 .

It is a cyclic number.

It is not a de Polignac number, because 1958432261 - 2⁶ = 1958432197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1958432461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979216130 + 979216131.

It is an arithmetic number, because the mean of its divisors is an integer number (979216131).

Almost surely, 2^1958432261 is an apocalyptic number.

It is an amenable number.

1958432261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1958432261 is an equidigital number, since it uses as much as digits as its factorization.

1958432261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 1958432261 is about 44254.1778931662. The cubic root of 1958432261 is about 1251.1311916955.

The spelling of 1958432261 in words is "one billion, nine hundred fifty-eight million, four hundred thirty-two thousand, two hundred sixty-one".