1620957167 has 2 divisors, whose sum is σ = 1620957168. Its totient is φ = 1620957166.

The previous prime is 1620957133. The next prime is 1620957251. The reversal of 1620957167 is 7617590261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1620957167 - 2¹⁰ = 1620956143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620917167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810478583 + 810478584.

It is an arithmetic number, because the mean of its divisors is an integer number (810478584).

Almost surely, 2^1620957167 is an apocalyptic number.

1620957167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620957167 is an equidigital number, since it uses as much as digits as its factorization.

1620957167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 1620957167 is about 40261.1123418119. The cubic root of 1620957167 is about 1174.6915543481.

The spelling of 1620957167 in words is "one billion, six hundred twenty million, nine hundred fifty-seven thousand, one hundred sixty-seven".