1602135391 has 2 divisors, whose sum is σ = 1602135392. Its totient is φ = 1602135390.

The previous prime is 1602135373. The next prime is 1602135401. The reversal of 1602135391 is 1935312061.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1602135391 - 2⁹ = 1602134879 is a prime.

It is a super-2 number, since 2×1602135391² = 5133675622189445762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1602135091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801067695 + 801067696.

It is an arithmetic number, because the mean of its divisors is an integer number (801067696).

Almost surely, 2^1602135391 is an apocalyptic number.

1602135391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1602135391 is an equidigital number, since it uses as much as digits as its factorization.

1602135391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1602135391 is about 40026.6834873938. The cubic root of 1602135391 is about 1170.1271907407.

The spelling of 1602135391 in words is "one billion, six hundred two million, one hundred thirty-five thousand, three hundred ninety-one".