1953399061 has 2 divisors, whose sum is σ = 1953399062. Its totient is φ = 1953399060.

The previous prime is 1953399031. The next prime is 1953399067. The reversal of 1953399061 is 1609933591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1928088100 + 25310961 = 43910^2 + 5031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1953399061 - 2⁵ = 1953399029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953399067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976699530 + 976699531.

It is an arithmetic number, because the mean of its divisors is an integer number (976699531).

Almost surely, 2^1953399061 is an apocalyptic number.

It is an amenable number.

1953399061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953399061 is an equidigital number, since it uses as much as digits as its factorization.

1953399061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 1953399061 is about 44197.2743616617. The cubic root of 1953399061 is about 1250.0584636122.

The spelling of 1953399061 in words is "one billion, nine hundred fifty-three million, three hundred ninety-nine thousand, sixty-one".