742693531 has 2 divisors, whose sum is σ = 742693532. Its totient is φ = 742693530.

The previous prime is 742693513. The next prime is 742693537. The reversal of 742693531 is 135396247.

It is a happy number.

Together with previous prime (742693513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 742693531 - 2⁷ = 742693403 is a prime.

It is a super-2 number, since 2×742693531² = 1103187361978495922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (742693537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371346765 + 371346766.

It is an arithmetic number, because the mean of its divisors is an integer number (371346766).

Almost surely, 2^742693531 is an apocalyptic number.

742693531 is a deficient number, since it is larger than the sum of its proper divisors (1).

742693531 is an equidigital number, since it uses as much as digits as its factorization.

742693531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 742693531 is about 27252.4041324798. The cubic root of 742693531 is about 905.6002777606.

The spelling of 742693531 in words is "seven hundred forty-two million, six hundred ninety-three thousand, five hundred thirty-one".