139137451 has 2 divisors, whose sum is σ = 139137452. Its totient is φ = 139137450.

The previous prime is 139137433. The next prime is 139137457. The reversal of 139137451 is 154731931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139137451 - 2¹⁵ = 139104683 is a prime.

It is not a weakly prime, because it can be changed into another prime (139137457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69568725 + 69568726.

It is an arithmetic number, because the mean of its divisors is an integer number (69568726).

Almost surely, 2^139137451 is an apocalyptic number.

139137451 is a deficient number, since it is larger than the sum of its proper divisors (1).

139137451 is an equidigital number, since it uses as much as digits as its factorization.

139137451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 139137451 is about 11795.6539030272. The cubic root of 139137451 is about 518.1808363217.

The spelling of 139137451 in words is "one hundred thirty-nine million, one hundred thirty-seven thousand, four hundred fifty-one".