151691797 has 2 divisors, whose sum is σ = 151691798. Its totient is φ = 151691796.

The previous prime is 151691767. The next prime is 151691807. The reversal of 151691797 is 797196151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150038001 + 1653796 = 12249^2 + 1286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151691797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151691707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75845898 + 75845899.

It is an arithmetic number, because the mean of its divisors is an integer number (75845899).

Almost surely, 2^151691797 is an apocalyptic number.

It is an amenable number.

151691797 is a deficient number, since it is larger than the sum of its proper divisors (1).

151691797 is an equidigital number, since it uses as much as digits as its factorization.

151691797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 46.

The square root of 151691797 is about 12316.3223812955. The cubic root of 151691797 is about 533.3193797999.

The spelling of 151691797 in words is "one hundred fifty-one million, six hundred ninety-one thousand, seven hundred ninety-seven".