149487431497 has 2 divisors, whose sum is σ = 149487431498. Its totient is φ = 149487431496.

The previous prime is 149487431449. The next prime is 149487431537. The reversal of 149487431497 is 794134784941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125500856121 + 23986575376 = 354261^2 + 154876^2 .

It is a cyclic number.

It is not a de Polignac number, because 149487431497 - 2¹⁵ = 149487398729 is a prime.

It is a super-2 number, since 2×149487431497² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149487431437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74743715748 + 74743715749.

It is an arithmetic number, because the mean of its divisors is an integer number (74743715749).

Almost surely, 2^149487431497 is an apocalyptic number.

It is an amenable number.

149487431497 is a deficient number, since it is larger than the sum of its proper divisors (1).

149487431497 is an equidigital number, since it uses as much as digits as its factorization.

149487431497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 61.

The spelling of 149487431497 in words is "one hundred forty-nine billion, four hundred eighty-seven million, four hundred thirty-one thousand, four hundred ninety-seven".